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[ CAS No. 4363-35-3 ] {[proInfo.proName]}

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Chemical Structure| 4363-35-3
Chemical Structure| 4363-35-3
Structure of 4363-35-3 * Storage: {[proInfo.prStorage]}
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Product Details of [ 4363-35-3 ]

CAS No. :4363-35-3 MDL No. :N/A
Formula : C8H9BO2 Boiling Point : -
Linear Structure Formula :- InChI Key :VKIJXFIYBAYHOE-VOTSOKGWSA-N
M.W : 147.97 Pubchem ID :5702628
Synonyms :

Calculated chemistry of [ 4363-35-3 ]

Physicochemical Properties

Num. heavy atoms : 11
Num. arom. heavy atoms : 6
Fraction Csp3 : 0.0
Num. rotatable bonds : 2
Num. H-bond acceptors : 2.0
Num. H-bond donors : 2.0
Molar Refractivity : 45.67
TPSA : 40.46 Ų

Pharmacokinetics

GI absorption : High
BBB permeant : Yes
P-gp substrate : No
CYP1A2 inhibitor : No
CYP2C19 inhibitor : No
CYP2C9 inhibitor : No
CYP2D6 inhibitor : No
CYP3A4 inhibitor : No
Log Kp (skin permeation) : -6.16 cm/s

Lipophilicity

Log Po/w (iLOGP) : 0.0
Log Po/w (XLOGP3) : 1.47
Log Po/w (WLOGP) : 0.6
Log Po/w (MLOGP) : 0.85
Log Po/w (SILICOS-IT) : -0.29
Consensus Log Po/w : 0.53

Druglikeness

Lipinski : 0.0
Ghose : None
Veber : 0.0
Egan : 0.0
Muegge : 1.0
Bioavailability Score : 0.55

Water Solubility

Log S (ESOL) : -1.96
Solubility : 1.64 mg/ml ; 0.0111 mol/l
Class : Very soluble
Log S (Ali) : -1.93
Solubility : 1.75 mg/ml ; 0.0119 mol/l
Class : Very soluble
Log S (SILICOS-IT) : -1.36
Solubility : 6.5 mg/ml ; 0.044 mol/l
Class : Soluble

Medicinal Chemistry

PAINS : 0.0 alert
Brenk : 1.0 alert
Leadlikeness : 1.0
Synthetic accessibility : 1.81

Safety of [ 4363-35-3 ]

Signal Word:Warning Class:N/A
Precautionary Statements:P261-P305+P351+P338 UN#:N/A
Hazard Statements:H302-H315-H319-H335 Packing Group:N/A
GHS Pictogram:

Application In Synthesis of [ 4363-35-3 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 4363-35-3 ]

[ 4363-35-3 ] Synthesis Path-Downstream   1~88

  • 1
  • [ 4363-35-3 ]
  • [ 19978-41-7 ]
  • 3-Bromo-5-((E)-styryl)-pyran-2-one [ No CAS ]
  • 2
  • [ 4363-35-3 ]
  • [ 19978-41-7 ]
  • 5-Bromo-3-((E)-styryl)-pyran-2-one [ No CAS ]
  • 3
  • [ 866026-77-9 ]
  • [ 4363-35-3 ]
  • (E)-2-(5,5-dimethyl-2-styrylcyclopent-2-enyl)-1-phenylethanone [ No CAS ]
  • 4
  • [ 485829-15-0 ]
  • [ 4363-35-3 ]
  • (E)-β-(15-vindolinyl)styrene [ No CAS ]
  • 5
  • [ 959912-60-8 ]
  • [ 4363-35-3 ]
  • 5,5-dimethyl-2-(morpholin-4-yl)-3-[(E)-2-phenylvynyl]-5,6-dihydro-1-benzothiophen-7(4H)-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
7% With potassium phosphate;palladium diacetate; 1,3-bis-(diphenylphosphino)propane; In 1,4-dioxane; at 90℃; for 36h; EXAMPLE 144; 5,5-Dimethyl-2-(morpholin-4-yl')-3 - [(E)-2-phenylvmyl] -5 ,6-dihydro- 1 -benzothiophen-; A mixture of Example 16 (0.32 g, 0.93 mmol), styreneboronic acid (0.41 g, 2.79 mmol), palladium acetate (0.02 g, 0.08 mmol), l,3-bis(diphenylphosphino)propane (0.038 <n="120"/>g, 0.08 mmol) and K3PO4 (0.59 g, 3.30 mmol) in 1,4-dioxane (30 mL) was heated at 9O0C for 36 h. The reaction mixture was then concentrated in vacuo. Purification by column chromatography (SiO2, 0-25% EtOAc/hexanes) gave the title compound (0.02 g, 7%) as an off-white solid. deltaH (DMSO-d6) 7.61-7.40 (2H, m), 7.40-7.37 (2H, m), 7.30-7.26 (IH, m), 6.99 (2H, s), 3.83-3.73 (4H, m). 3.18-3.08 (4H, m), 2.80 (2H, s), 2.40 (2H, s), 0.96 (6H, s). MS (ES+) 368.0 (M+H)+.
  • 6
  • [ 25462-85-5 ]
  • [ 4363-35-3 ]
  • 2-methyl-6-styryl-isonicotinic acid [ No CAS ]
YieldReaction ConditionsOperation in experiment
A suspension of 2-chloro-6-methyl-isonicotinic acid (171.6 mg, [1] mmol), 2- [PHENYL-ETHENEBORONIC] acid (180.0 mg, 1.2 [MMOL),] [K2CO3] (414 mg), Pd [(DPPF) C12-] CH2Cl2 (27 mg) in [CH3CN-H20] (3: 1,10 mL) is stirred under argon at [90C] for 15 h. The solution is cooled to r. t. and aq. hydrochloric acid (2M, 1.5 mL) is added to adjust the pH at 3. The mixture is evaporated to dryness and purified by MPLC (C18, H2O-MeOH) to provide the title compound.
  • 7
  • [ 696-62-8 ]
  • [ 4363-35-3 ]
  • [ 1694-19-5 ]
YieldReaction ConditionsOperation in experiment
92% With potassium carbonate;Co0.38Fe0.57LaO3Pd0.05; In water; isopropyl alcohol; at 80℃; for 18h;Product distribution / selectivity; 2-2) Reaction between aryliodide and boronic acid The aryliodide and boronic acid shown in TABLE 6 were allowed to react with each other under the reaction conditions shown in TABLE 6, using the Pd-containing perovskite-like composite oxide produced in Example of production 1 as the catalyst for synthesis reaction. Yields in the respective reactions are shown in TABLE 6.
  • 8
  • [ 23147-58-2 ]
  • [ 603965-77-1 ]
  • [ 4363-35-3 ]
  • [ 944541-49-5 ]
YieldReaction ConditionsOperation in experiment
61% In ethanol; at 20℃; for 48h; A mixture of 2-(l-piperazinyl)- 5-pyrimidinecarboxylic acid, ethyl ester (0.016 mol),(2-phenylethenyl)- boronic acid (0.016 mol) and l,4-dioxane-2,5-diol (0.016 mol) inEtOH (250 ml) was stirred for 2 days at room temperature and then the solvent wasevaporated (vac.), The residue was taken up in DCM and water and the organic layerwas separated, dried (MgSO4), filtered and the solvent was evaporated. The residue waspurified by column chromatography over silica gel (15-40/xm) (eluent: DCM/MeOH97/1). The pure fractions were evaporated, yielding 4g (61%) of intermediate 1, meltingpoint 128C.Esters, corresponding to intermediate 1, can be separated by chiral chromatography.
61% In ethanol; at 20℃; for 48h; a) Preparation of intermediate 1. A mixture of 2-(l-piperazinyl)- 5-pyrimidinecarboxylic acid, ethyl ester (0.0169 mol), (2-phenylethenyl)-boronic acid (0.0169 mol) and l,4-dioxane-2,5-diol (0.0169 mol) in ethanol (250 ml) was stirred for 2 days at room temperature and then the solvent was evaporated (vacuum). The residue was taken up in CH2Cl2 and H2O and the organic layer was separated, dried (MgSO4), filtered and the solvent was evaporated. The residue was purified by column chromatography over silica gel (15-40mum) (eluent: CH2C12/CH3OH 97/1). The pure fractions were evaporated, yielding 4g (61%) of intermediate 1 (M.P.: 128C; E-configuration).
  • 9
  • [ 319472-83-8 ]
  • [ 4363-35-3 ]
  • [ 319472-84-9 ]
YieldReaction ConditionsOperation in experiment
74% With sodium hydroxide;Pd(PPh3)4; In methanol; ethyl acetate; toluene; To 6-nitro-3-iodo-[2-(trimethyl-silanyl)-ethoxymethyl]-1H-indazole (11.0 g, 26.1 mmol), styryl boronic acid (4.64, 31.4 mmol), and Pd(PPh3)4 (1.25 g, 1.08 mmol) under an atmosphere of argon was added toluene (192 mL), MeOH (4 mL) and 2N NaOH (aq) (32.6 mL, 65.3 mmol). The resulting heterogeneous mixture was heated to 90 C. After 8 h the reaction was diluted with EtOAc (150 mL) and water (50 mL), the phases were separated and the organic was extracted 2*50 mL EtOAc. The pooled organic phase was washed with brine (50 mL), then dried with Na2SO4, filtered and concentrated under reduced pressure. The crude reaction was purified by silica gel chromatography (1:9 EtOAc:hexane) to give 6-nitro-3-styryl-1-[2-(trimethyl-silanyl)-ethoxymethyl]-1H-indazole as a yellow solid (7.65 g, 74%): 13C NMR (75 MHz, CDCl3) delta 148.3, 145.0, 141.3, 138.1, 134.2, 130.5, 129.9, 129.8, 129.5, 128.1, 127.4, 123.2, 119.8, 117.8, 108.2,79.7,68.5, 19.2,0.0; MS (FAB) [M+Na]/z Calc'd 418, found 418. Anal. Calc'd: C, 63.77; H, 6.37; N, 10.62. Found: C, 64.04; H, 6.29; N, 10.56.
  • 10
  • [ 909010-90-8 ]
  • [ 4363-35-3 ]
  • [ 909010-91-9 ]
YieldReaction ConditionsOperation in experiment
With caesium carbonate;tetrakis(triphenylphosphine) palladium(0); In 1,4-dioxane; at 120℃; for 0.5h;Irradiation; e) 7-Hydroxy-2-styryl-thieno[3,2-c]pyridine-6-carboxylic acid ethyl ester Under a nitrogen atmosphere ester 2-Bromo-7-hydroxy-thieno[3,2-c]pyridine-6-carboxylic acid ethyl ester (250 mg, 0.83 mmol, example 21.d), styreneboronic acid (185 mg, 1.25 mmol), cesium carbonate (675 mg, 2.08 mmol), and tetrakis(triphenylphosphine)palladium(0) (92 mg, 0.08 mmol) were suspended in 4 mL of anhydrous 1,4 dioxane. The reaction mixture was heated at 120 C. for 30 minutes in a CEM microwave reactor, cooled to room temperature, and diluted with ethyl acetate. The organic mixture was successively washed with water, saturated sodium bicarbonate, and brine solutions. The organic fractions were dried over anhydrous sodium sulfate and concentrated to a crude solid residue, which was then purified by column chromatography, eluding the desired product from silica gel with a gradient of 20-60% ethyl acetate in hexanes: 224 mg of an off-white solid. MS: (+) m/z 326.0 (M+1)
  • 11
  • [ 29495-19-0 ]
  • [ 4363-35-3 ]
  • [ 1152495-30-1 ]
  • [ 84680-54-6 ]
YieldReaction ConditionsOperation in experiment
In water 25 Example 25 Example 25 Alanine-proline (1,000 mg, 5.37 mmol), glyoxylic acid monohydrate (544 mg, 5.91 mml) and 2-phenylethenyl boronic acid (1,192 mg, 8 mmol) were vigorously stirred together in water (7 mL) for 48 hours. The precipitate was filtered, washed with acetone (2*10 mL) and dried to give a single crystalline product (1,488 mg, 80% yield, >99% de) the structure of which was confirmed with X-ray crystallography. 1H NMR (360 MHz, DCl/D2O) δ 7.10-7.25 (br, 5H), 6.92 (d, J=15.6 Hz, 1H), 5.78 (dd, J=15.6 Hz, 9.8 Hz, 1H), 4.75 (d, J=9.8 Hz, 1H), 4.15 (q, J=6.8 Hz, 1H), 3.84 (m, 1H), 3.20 (m, 2H), 1.58 (m, 2H), 1.41 (d, J=6.8 Hz, 3H), 1.01-1.35 (m, 2H). 13C NMR (90 MHz, DCl/D2O) δ 174.2, 168.7, 168.2, 142.6, 133.4, 130.4, 129.3, 127.1, 114.7, 62.3, 59.4, 54.0, 47.4, 28.0, 24.0, 15.1. HRMS-CI calcd for C18H22N2O5 (M+H+) 347.1528, found 347.1598. Anal. Calcd for C18H22N2O5: C, 62.42; H, 6.40; N, 8.09. Found: C, 62.46; H, 6.41 N, 8.02. This compound was hydrogenated in methanol with Pd/C as catalyst to give pure enalaprilat.
  • 12
  • [ 6310-09-4 ]
  • [ 4363-35-3 ]
  • [ 125972-78-3 ]
YieldReaction ConditionsOperation in experiment
99% With potassium carbonate;[1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene](3-chloropyridyl)palladium(II) dichloride; In 1,4-dioxane; at 60℃; for 6h;Product distribution / selectivity; In air, a vial was charged with complex Ih (6.8 mg, 0.01 mmol), potassium carbonate (207 mg, 1.50 mmol), the boronic acid (0.6 mmol) and the organohalide (0.5 mmol). The vial was sealed with a septum and purged with argon (3×). Dioxane (2.0 mL) was added and the contents were stirred at 60 C. for the specified period of time. The reaction was then diluted with diethyl ether (2 mL) and transferred to a round bottom flask. The reaction vial was rinsed with additional diethyl ether (2 mL) and combined with the previous dilution. Each reaction was performed in duplicate and the contents were combined, concentrated onto silica gel and purified by flash chromatography.
  • 13
  • 5-(5-bromo-2-isobutoxyphenyl)-1H-pyrazole [ No CAS ]
  • [ 4363-35-3 ]
  • (E)-5-(2-isobutoxy-5-styrylphenyl)-1H-pyrazole [ No CAS ]
YieldReaction ConditionsOperation in experiment
With caesium carbonate;tetrakis(triphenylphosphine) palladium(0); In water; toluene; at 110℃; for 7.5h; Compound 80: (E)-5-(2-isobutoxy-5-styrylphenyl)-1H-pyrazole Compound 79 (507 mg, 1.72 mmol), phenylboronic acid (305 mg, 2.06 mmol), palladium tetrakistriphenylphosphine (99 mg, 0.09 mmol), cesium carbonate (2M, 5 mL) and toluene (5 mL) were stirred under nitrogen at 110 C. for 7.5 hours. After cooling, the mixture was partitioned between ethyl acetate and saturated aqueous sodium bicarbonate. The organics were dried and concentrated. Chromatography (SiO2, 20 to 40% ethyl acetate:hexanes) gave the title compound. [M+H] calc'd for C21H23N2O: 319; found 319.
  • 14
  • C15H21BrN2O2 [ No CAS ]
  • [ 4363-35-3 ]
  • [3-(styryl)-phenyl]carbamic acid 1-aza-bicyclo[2.2.2]oct-3-yl ester [ No CAS ]
YieldReaction ConditionsOperation in experiment
39% With sodium carbonate;tetrakis(triphenylphosphine) palladium(0); In toluene; at 0 - 120℃; for 0.166667h;Microwave irradiation; 3-Bromo-carbamic acid l-aza-bicyclo[2.2.2]oct-3-yl ester 141 (325 mg, lmmol), <strong>[4363-35-3]styrylboronic acid</strong> (300 mg, 2mmol), tetrakis-(triphenylphosphin)-palladium(0) (115.5 mg, 0.1 mmol), Na2CO3 (233 mg, 2.2mmol), toluene (5mL) and a magnetic stir bar were placed in a 10-mL microwave glass tube. The vessel was sealed with a septum and placed into the microwave cavity. Microwave irradiation of 60 W was used, the temperature being ramped from room temperature to 120 0C. Once 120 0C was reached, the reaction mixture was held for 10 min. Then the mixture was allowed to cool to room temperature, the reaction vessel was opened and the solvent was evaporated under pressure. The oily residue was purified by column chromatography on silica gel eluting with CtbCk/MeOH (90: 10). The final product was crystallised from the mixture of diethyl ether/petroleum ether and obtained as a yellow crystalline powder (101.1 mg, 0.2 mmol, 39%).M.p.: 174- 175 C IR (KBr): 3021, 2945, 2771, 2661, 2589, 1728, 1589, 1547, 1224, 960 cm '1H NMR (500 MHz, DMSCW6) delta 9.81 (s, 1 H, NH); 7.70 (s, 1 H, H2'); 7.59 (d, 3J = 7.1 Hz, 2 H, H2" + H6"); 7.44 (d, J = 7.3 Hz, 1 H, H6'); 7.37 (t, 3J = 7.4 Hz, 3 H, H3" + H5" + <n="96"/>H5'); 7.26 - 7.29 (m, 2 H, H4' + H4"); 7.20 (d, 3J = 16.6 Hz5 1 H, -CH=); 7.13 (d, 3J = 16.6 Hz, 1 H5-CH=); 4.93 - 5.00 (m5 1 H, H3); 3.68 (ddd, J = 2.1 Hz, J = 8.4 Hz, J = 13.7 Hz, 1 H3 H2A); 3.15 - 3.25 (m, 5 H, H2B + H6 + H8); 2.28 (sx, J = 2.9 Hz, 1 H, H4); 1.73 - 1.91 (m, 4 H, H5 + H7)13C NMR (125 MHz, DMSO-^) delta 153.0 (C=O); 139.3 (Cl'); 137.7 (C3'); 136.9 (Cl"); 129.2, 128.8 (C3" + C5"); 128.7 (-CH=); 128.5 (C5'); 127.9 (C4"); 126.7 (C2" + C6"); 121.2 (C4'); 118.03 (C6'); 116.5 (C2'); 67.6 (C3); 53.1 (C2); 45.9 (C8); 45.1 (C6); 24.0 (C4); 20.2 (C7); 16.9 (C5) MS (EI) m/z 348.2 (100) [M+]Anal, calcd. for C22H24N2O2 (348.45): C, 75.83; H, 6.94; N5 8.04Found C, 75.68; H, 6.96; N, 8.23.
  • 15
  • [ 948828-19-1 ]
  • [ 4363-35-3 ]
  • [ 1032737-01-1 ]
YieldReaction ConditionsOperation in experiment
With sodium carbonate;tetrakis(triphenylphosphine) palladium(0); In 1,2-dimethoxyethane; water; at 160℃; for 0.166667h;Microwave irradiation; A 3 mL Smith Process Vial was charged with 6-bromo-3 -ethyl thieno [2,3- b]pyrimidine-2,4-dione (48.8 mg, 0.1688 mmol), 2-phenylethenylboronic acid (70.0 mg, 0.422 mmol, 2.5 equiv) and Pd(Ph3P)4 (9.8 mg, 0.00844 mmol, 0.05 equiv) under argon atmosphere. Into the flask were added DME (2 mL) and 2M-Na2CO3 (0.5 mL) at room temperature so that concentration of the starting material becomes 0.07 M. The mixture was heated by microwave reactor at 1600C for 10 min. (Emrys Optimizer microwave, Smith Process Vial and Emrys Optimizer are registered trademarks of Personal chemistry, Inc., Uppsala). The mixture was filtered through Celite (3 g) and the Celite was washed with EtOAc (70 mL). The filtrate was washed with brine (30 mL) and dried with Na2SO4. After filtering off the drying agent, the solvent was removed under reduced pressure to give a crude mixture. Purification by recrystallization of the crude mixture from AcOEt (4 mL) afforded the 3-ethyl-5-methyl-6-(E-2-phenylethenyl}thieno[2,3- b]pyrimidine-2,4-dione as a light brown powder.1H NMR: (400 MHz, CDCl3)1.30 (3H, t, J = 7.0 Hz, NCH2CH5), 2.60 (3H, s, C(S)Me), 4.09 (2H, q, J = 7.0 Hz, NCH2CH3), 6.71 (IH, d, J= 16.0 Hz, -CH=CH-Ph), 7.25 (1eta, d, J= 16.0 Hz, -CH=CH- Ph), 7.27 (IH, bd t, J = 7.8 Hz, C(4")H), 7.36 (2H, br t, J = 7.8 Hz, C(3")H+C(5")H), 7.46 (2H, br d, J= 7.8 Hz, C(2")H+C(6")H)Attorney Docket No. 06-0227-WO 38 06-0227 <n="40"/>MS (EI): 313 (M++1), 284, 261, 182
  • 16
  • [ 59995-47-0 ]
  • [ 4363-35-3 ]
  • (3R,4S)-3-hydroxy-4-styrylcyclopentanone [ No CAS ]
  • 17
  • [ 13466-38-1 ]
  • [ 4363-35-3 ]
  • [ 1198415-92-7 ]
YieldReaction ConditionsOperation in experiment
51% With potassium carbonate;palladium diacetate; tricyclohexylphosphine; In water; toluene; at 100℃;Inert atmosphere; Following general procedure E, compound 57 was synthesized (yield of first step 51%; yield of second step 17%). MS-ESI: m/z=274.3 [M+1]+ ; General procedure E: (Alternative Suzuki coupling reaction conditions) To a solution of <strong>[13466-38-1]5-bromo-2-hydroxypyridine</strong> (1 eq.), corresponding boronic acid (1.2 eq), potassium carbonate (3.5 eq) and tricyclohexylphosphine (0.1 eq) in toluene/water (2:1, v:v) under nitrogen atmosphere is added palladium acetate (0.05 eq). The mixture is heated to 100 C. for 2-3 h, and then cooled to room temperature, water is added and the mixture extracted with EA; the combined organics are washed with brine, dried over sodium sulfate, and concentrated in vacuo. Purification by prep-TLC affords the desired 5-substituted-2-hydroxypyridine. The second coupling, a Suzuki coupling, of the intermediate 5-substituted-2-hydroxypyridine with an aryl boronic acid is performed following General Procedure A, as described above.
  • 18
  • [ 1198416-39-5 ]
  • [ 4363-35-3 ]
  • [ 1198411-49-2 ]
YieldReaction ConditionsOperation in experiment
Following general procedure D, compound 55 was prepared in 65% yield as a solid. MS-ESI: m/z=274.3 [M+1]+ ; General procedure D: For step 1, the procedure is the same as for general procedure A. For step 2, a solution of the intermediate benzyl protected phenol (3.5 g, 10.8 mmol) in methanol (200 ml) is added to a Pd/C (300 mg) catalyst under N2 atmosphere, and then stirred for 2 h under H2 atmosphere (1 atm, 25 C.). The catalyst is filtered off through a celite pad, and the filtrate is concentrated in vacuo to give the free phenolic hydroxyl. For step 3, a solution of the resulting phenol intermediate (2.2 g, 11.8 mmol) in dichloromethane (DCM, 120 mL) is added to triethylamine (1.7 g, 16.8 mmol) at -78 C., followed by the addition of trifluoromethanesulfonic anhydride (4.76 g, 16.9 mmol). The resulting mixture is stirred at -78 C. for 15 min and quenched with ammonium chloride solution (10 mL). After warming to room temperature, water (30 mL) and DCM (50 mL) are added and separated. The target product is obtained by washing the crude mixture with methanol. For step 4, a solution of trifluoromethanesulfonic acid intermediate (0.79 mmol ) and tetrakis(triphenylphosphine)palladium (0.011 g, 0.0095 mmol) in dimethoxyethane (DME, 1 mL) is stirred at room temperature for 15 min followed by the addition of the solution arylboronic acid (0.21 mmol) in DME (1 mL) and 2M sodium carbonate (1 mL). The resulting mixture is refluxed for 14 hr and cooled down to room temperature. Water and ethyl acetate are added. After separation, the aqueous layer is extracted with ethyl acetate. The combined ethyl acetate solution is dried over sodium sulfate and filtered. The filtrate is concentrated in vacuo to dryness. Target products are isolated by prep-TLC.
  • 19
  • [ 63071-13-6 ]
  • [ 4363-35-3 ]
  • [ 103-49-1 ]
  • C28H25ClN2 [ No CAS ]
  • 20
  • [ 54221-96-4 ]
  • [ 4363-35-3 ]
  • [ 103-49-1 ]
  • C29H28N2O [ No CAS ]
  • 21
  • [ 853941-51-2 ]
  • [ 4363-35-3 ]
  • [ 1268631-81-7 ]
YieldReaction ConditionsOperation in experiment
72% With potassium phosphate; tetrakis(triphenylphosphine) palladium(0); In 1,4-dioxane; at 80℃; for 2h;Inert atmosphere; A mixture of aminopyrazinetriflate (9) (100 mg, 0.300 mmol) and boronic acid (90 mg, 0.600 mmol) and Pd(PPh3)4 (35 mg, 0.0300 mmol) and K3PO4 (127 mg, 0.600 mmol) in dioxane (2 mL) was heated to 80 C for 6 h. The mixture was treated with 1 N NaOH aq (1 mL) and 30% H2O2 (1 mL) for 1 h at room temperature to oxidize the residual borane. To this mixture, 1 N HCl aq (1 mL) was added for neutralization. The product was extracted with AcOEt (×3), washed with brine, and dried over Na2SO4. After evaporation, the residue was purified by column chromatography on silica gel with AcOEt/hexane (1:2) to give aminopyrazine (2f) (63 mg, 72%) as a pale yellow solid. 1H NMR (CDCl3, 400 MHz), delta 4.16 (2H, s, CH2Ph), 4.44 (2H, s, NH2), 7.10 (1H, d, J=15.8 Hz, CH-1'), 7.24-7.38 (6H, m, Ph), 7.50 (1H, d, J=15.8 Hz, CH-2'), 7.54-7.56 (4H, m, Ph), 8.02 (1H, s, CH-6) ppm. 13C NMR (CDCl3, 150 MHz), delta 41.3, 124.8, 126.7, 127.1, 127.7, 128.5, 128.7, 129.0, 129.6, 136.6, 137.1, 139.4, 141.0, 141.2, 151.7 ppm. FAB-MS (NBA) m/z 288 (MH+). HRMS (FAB/NBA) calcd for C19H18N3 288.1561, found 288.1507 (MH+).
  • 22
  • [ 1268631-67-9 ]
  • [ 4363-35-3 ]
  • 8-benzyl-2-(4-hydroxybenzylidene)-6-styrylimidazo[1,2-a]-pyrazin-3(2H)-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
54% With potassium phosphate; tetrakis(triphenylphosphine) palladium(0); In 1,4-dioxane; at 40℃; for 1h;Inert atmosphere; A round bottomed flask was charged with coelenterazinetriflate (11) (25 mg, 0.0507 mmol), boronic acid (15 mg, 0.114 mmol), Pd(PPh3)4 (7 mg, 0.00507 mmol), and K3PO4 (22 mg, 0.114 mmol) and connected to a vacuum/argon line. The flask was evacuated and then filled with argon, this evacuation/filling cycle being conducted three times. These reagents were dissolved in dioxane (1 mL) and then heated to 40 C for 1 h. The mixture was extracted with AcOEt (×3) and dried over Na2SO4. After evaporated, the residue was purified by preparative TLC to give dehydrocoelenterazine (14f) (14.0 mg, 54%) as a purple solid. IR (KBr) numax 3552, 1710, 1562, 1513, 1405 cm-1. 1H NMR (DMSO­d6, 400 MHz), delta 4.37 (2H, s, CH2Ph), 6.76 (2H, d, J=8.4 Hz, Ph-OMe), 7.17-7.54 (10H, m, Ph), 7.33 (1H, d, J=14.3 Hz, CH-1'), 7.44 (1H, d, J=14.3 Hz, CH-2'), 7.59 (1H, s, CH-5), 7.71 (2H, d, J=8.4 Hz, Ph-OMe) ppm. 13C NMR (pyridine-d5, 100 MHz), delta 39.9, 113.4, 116.8, 117.4, 123.0, 124.0, 124.3, 126.7, 127.0, 127.1, 127.2, 128.1, 128.8, 129.2, 130.3, 130.4, 132.7, 133.4, 137.0, 137.4, 137.7, 158.1, 163.4, 166.0 ppm. FAB-MS (NBA) m/z 432 (MH+). HRMS (FAB/NBA) calcd for C28H22N3O2 432.1712, found 432.1666 (MH+).
  • 23
  • [ 1262133-21-0 ]
  • [ 4363-35-3 ]
  • C25H24ClNO3 [ No CAS ]
YieldReaction ConditionsOperation in experiment
62% With potassium carbonate;dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; In 1,4-dioxane; water; at 80℃; for 3h; Step 7-3 The compound (15 g) obtained in step 7-2 and 1,4-dioxane (150 ml) were mixed, potassium carbonate (18 g), phenylvinylboric acid (7.1 g), [1,1'-bis(diphenylphosphino)ferrocene]palladium(II) dichloride dichloromethane complex (1:1) (1.8 g) and water (45 ml) were added and the mixture was stirred at 80 C. for 1.5 hr with heating. Phenylvinylboric acid (0.64 g) was added and the mixture was stirred for 1.5 hr. The mixture was cooled to room temperature, and water, ethyl acetate and saturated brine were added to separate the organic layer. The organic layer was concentrated under reduced pressure and the obtained residue was purified by column chromatography (eluent: chloroform). To the obtained solid was added isopropyl alcohol (100 ml) and the mixture was slurried at 70 C. for 0.5 hr and under ice-cooling to give the compound described in the above-mentioned scheme (11.5 g, 62%).1H-NMR (CDCl3) delta: 1.55 (s, 9H), 5.21 (s, 2H), 6.87 (s, 1H), 7.01 (d, 1H, J=15.9 Hz), 7.30-7.44 (m, 8H), 7.56 (d, 2H, J=7.1 Hz), 7.65 (d, 1H, J=16.1 Hz).
  • 24
  • [ 591-50-4 ]
  • [ 4363-35-3 ]
  • [ 103-30-0 ]
YieldReaction ConditionsOperation in experiment
98% With potassium carbonate; In ethanol; at 80℃; for 3h;Inert atmosphere; General procedure: A mixture of 1a (102 mg, 0.5 mmol), phenylboronic acid 2a(91.4 mg, 0.75 mmol), and K2CO3(138 mg, 1.0 mmol) in EtOH (3 mL) was heated in the presence of SGlPd at 80C for 3 h under argon an atmosphere without stirring. After the reaction mixture was cooled to room temperature, the SGlPd was removed from the reaction mixture and rinsed several time with EtOH. The raction mixture was poured into 2 MNaOH aq., extracted with AcOEt. The organic layer was washed with sat. aq. NH4Cl, and sat. aq. NaCl, dried over anhydrous NaSO4. Concentration at reduced pressure gave yellowish oil, which was chromatographed on silica gel with hexane as the eluent to give the biphenyl (3a, 77.1 mg, 99%) as a colorless solid. The recovered SGlPd catalyst was again subjected to next reaction for second run. The procedure was repeated a total 10 runs.
  • 25
  • [ 696-62-8 ]
  • [ 4363-35-3 ]
  • [ 4333-75-9 ]
  • [ 1694-19-5 ]
YieldReaction ConditionsOperation in experiment
19%; 71% With Pd(OH)2/Fe3O4; sodium carbonate; In toluene; at 130℃; for 24h; General procedure: To a stirred solution of aromatic iodide (1, 1 mmol) in toluene (2 mL) were added Pd(OH)2/Fe3O4 (50 mg, 1.2 mol % of Pd), Na2CO3 (3 mmol, 318 mg), and the corresponding boronic acid (2 or 4, 3 mmol). The resulting mixture was stirred at 130 C for 1 h. The catalyst was removed by a magnet and the resulting mixture was quenched with water and extracted with EtOAc. The organic phases were dried over MgSO4, followed by evaporation under reduced pressure to remove the solvent. The corresponding products 3 or 5 were usually purified by chromatography on silica gel (hexane/ethyl acetate).
  • 26
  • [ 13816-02-9 ]
  • [ 4363-35-3 ]
  • 1-phenyl-4-(2-thiazolyl)-1-butene [ No CAS ]
  • 27
  • [ 772-03-2 ]
  • [ 4363-35-3 ]
  • 1-phenyl-4-(2-quinolyl)-1-butene [ No CAS ]
  • 28
  • [ 1352342-51-8 ]
  • [ 4363-35-3 ]
  • [ 1352342-53-0 ]
YieldReaction ConditionsOperation in experiment
With potassium phosphate;[1,1'-bis(diphenylphosphino)ferrocene]dichloropalladium(II); In 1,4-dioxane; at 140℃; for 1h; Compound C (0.500 g, 1.32 mmol), styrene boronic acid (0.292 g, 1.98 mmol), Pd(dppf)CI2 (0.107 mg, 0.134 mmol) and K3P04 (4 ml, 1 M solution) were combined in a 100 ml round bottom flask. The reaction vessel was placed under vacuum and then refilled with Ar three times. 1 ,4-dioxane (13 ml) was added to the solid mixture. The reaction vessel was heated to 140 C with stirring. The reaction was monitored by LC-MS, which showed complete conversion of the starting material after 1 hour. After the flask was cooled to room temperature, the mixture was concentrated under vacuum and re- dissolved in EtOAc. The organic solution was washed successively with concentrated NH4CI, water and brine and then dried over Na2SO4. The solution was concentrated under vacuum and the resulting solid was used in the next step without purification. MS [M+H]+ = 331.12.
  • 29
  • [ 4363-35-3 ]
  • [ 98495-62-6 ]
  • C29H44N2O6Si2 [ No CAS ]
YieldReaction ConditionsOperation in experiment
76% With tetrakis(triphenylphosphine) palladium(0); copper(I) thiophene-2-carboxylate; In tetrahydrofuran; at 50℃; for 24h;Inert atmosphere; General procedure: Compound 1 (419 mg, 0.7 mmol), Pd(PPh3)4 (49 mg, 0.042 mmol), CuTC (147 mg, 0.77 mmol), and 4-fluorophenylboronic acid (118 mg, 0.84 mmol) were flushed with Ar and subsequently suspended in dry THF (8 ml) under an Ar atmosphere. The reaction mixture was stirred at 50 C for 24 h and then allowed to cool to room temperature. The solvent was evaporated, and the residue was taken up in EtOAc (30 ml), and the organic layer was washed with satd NaHCO3 (2 × 20 ml) and brine (1 × 20 ml), dried over MgSO4, and evaporated. The residue was purified by silica gel column chromatography (0.5% EtOH in CH2Cl2) to yield the TIPDS-protected intermediate 2b (332 mg, 84%). 1H NMR (300 MHz, CDCl3) delta 8.56 (br s, 1H, NH), 7.43 (br s, 2H, ArH), 7.18 (t, 2H, J = 8.6 Hz, ArH), 5.55 (s, 1H, H-5), 5.51 (dd, 1H, J = 9.5, 3.1 Hz, H-1'), 4.97 (m, 1H, H-3'), 4.08-3.92 (m, 2H, H-5'), 3.67 (m, 1H, H-4'), 2.94-2.83 (m, 1H, H-2'), 2.24-2.10 (m, 1H, H-2'), 1.15-0.96 (m, 28H, 4 × i-propyl). 13C NMR (75 MHz, CDCl3) delta 163.98 (d, JCF = 251 Hz), 162.19, 155.93, 149.76, 130.24 (d, JCF = 8.3 Hz), 129.33 (d, JCF = 3.8 Hz), 116.47 (d, JCF = 22.5 Hz), 104.08, 86.50, 86.24, 73.76, 64.23, 39.79, (17.69, 17.57, 17.50, 17.47, 17.29, 17.12: 8 C), 13.42, 13.36, 12.83, 12.71. MS (ESI) calcd for C27H41FN2O6Si2 587.24 (M+Na+), 1151.49 (2 M+Na+); found 587.12, 1151.62.
  • 30
  • [ 4363-35-3 ]
  • [ 68-12-2 ]
  • [ 1885-38-7 ]
  • [ 24840-05-9 ]
  • 31
  • [ 1373125-68-8 ]
  • [ 4363-35-3 ]
  • C33H30F3NO [ No CAS ]
YieldReaction ConditionsOperation in experiment
53% With potassium phosphate; tris-(dibenzylideneacetone)dipalladium(0); tri tert-butylphosphoniumtetrafluoroborate; In water; toluene; at 90℃; for 14h; General procedure: The arylbromide (122 mg, 0.3 mmol), 3-methoxy-phenylboronic acid (137 mg, 0.900 mmol), potassium phosphate (191 mg, 0.900 mmol), Pd2(dba)3 (6.87 mg, 0.008 mmol), and tri-tert-butylphosphonium tetrafluoroborate (8.70 mg, 0.030 mmol) were combined in a mixture of degassed toluene (0.81 ml) and water (0.09 ml) and heated to 90 C for 14 h. At this time LC-MS showed a complete reaction. The reaction was cooled, diluted with ethyl acetate, and filtered through a small pad of silica gel eluting with ethyl acetate. The crude solution was concentrated and purified by silica gel chromatography (Biotage 25 g SNAP cartridge; 0-10% ethyl acetate in hexanes) to afford a clear viscous oil (121 mg, 93%).
  • 32
  • [ 141-79-7 ]
  • [ 4363-35-3 ]
  • [ 435276-29-2 ]
YieldReaction ConditionsOperation in experiment
65% With trifluoroacetic anhydride; In dichloromethane; at 60℃; for 18h; General procedure: To a stirred solution of boronic acid 1 (1.25 equiv) and 2 (1.0 equiv) in anhydrous CH2Cl2 (1.6 mL/mmol 1) was added trifluoroacetic anhydride (0.3 equiv). After stirring overnight (18 h), a saturated solution of Na2CO3 was added. The layers were separated and the aqueous one was extracted with Et2O. The combined organic layers were dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane/CH2Cl2 25:75).
  • 33
  • [ 1629-58-9 ]
  • [ 4363-35-3 ]
  • 1-phenyl-1-hepten-5-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
60% With trifluoroacetic anhydride; In dichloromethane; at 60℃; for 18h; General procedure: To a stirred solution of boronic acid 1 (1.25 equiv) and 2 (1.0 equiv) in anhydrous CH2Cl2 (1.6 mL/mmol 1) was added trifluoroacetic anhydride (0.3 equiv). After stirring overnight (18 h), a saturated solution of Na2CO3 was added. The layers were separated and the aqueous one was extracted with Et2O. The combined organic layers were dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane/CH2Cl2 25:75).
  • 34
  • [ 2497-21-4 ]
  • [ 4363-35-3 ]
  • [ 698999-53-0 ]
YieldReaction ConditionsOperation in experiment
85% With trifluoroacetic anhydride; In dichloromethane; at 60℃; for 18h; General procedure: To a stirred solution of boronic acid 1 (1.25 equiv) and 2 (1.0 equiv) in anhydrous CH2Cl2 (1.6 mL/mmol 1) was added trifluoroacetic anhydride (0.3 equiv). After stirring overnight (18 h), a saturated solution of Na2CO3 was added. The layers were separated and the aqueous one was extracted with Et2O. The combined organic layers were dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane/CH2Cl2 25:75).
  • 35
  • [ 495-41-0 ]
  • [ 4363-35-3 ]
  • [ 106728-01-2 ]
YieldReaction ConditionsOperation in experiment
90% With trifluoroacetic anhydride; In dichloromethane; at 25℃; for 18h; General procedure: To a stirred solution of boronic acid 1 (1.25 equiv) and 2 (1.0 equiv) in anhydrous CH2Cl2 (1.6 mL/mmol 1) was added trifluoroacetic anhydride (0.3 equiv). After stirring overnight (18 h), a saturated solution of Na2CO3 was added. The layers were separated and the aqueous one was extracted with Et2O. The combined organic layers were dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane/CH2Cl2 25:75).
  • 36
  • [ 614-57-3 ]
  • [ 4363-35-3 ]
  • [ 1393832-14-8 ]
YieldReaction ConditionsOperation in experiment
80% With trifluoroacetic anhydride; In dichloromethane; at 60℃; for 18h; General procedure: To a stirred solution of boronic acid 1 (1.25 equiv) and 2 (1.0 equiv) in anhydrous CH2Cl2 (1.6 mL/mmol 1) was added trifluoroacetic anhydride (0.3 equiv). After stirring overnight (18 h), a saturated solution of Na2CO3 was added. The layers were separated and the aqueous one was extracted with Et2O. The combined organic layers were dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane/CH2Cl2 25:75).
  • 37
  • [ 4363-35-3 ]
  • [ 94-41-7 ]
  • [ 854908-75-1 ]
YieldReaction ConditionsOperation in experiment
95% With trifluoroacetic anhydride; In dichloromethane; at 25℃; for 18h; General procedure: To a stirred solution of boronic acid 1 (1.25 equiv) and 2 (1.0 equiv) in anhydrous CH2Cl2 (1.6 mL/mmol 1) was added trifluoroacetic anhydride (0.3 equiv). After stirring overnight (18 h), a saturated solution of Na2CO3 was added. The layers were separated and the aqueous one was extracted with Et2O. The combined organic layers were dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane/CH2Cl2 25:75).
  • 38
  • [ 4363-35-3 ]
  • [ 122-57-6 ]
  • [ 649766-43-8 ]
YieldReaction ConditionsOperation in experiment
75% With trifluoroacetic anhydride; In dichloromethane; at 60℃; for 18h; General procedure: To a stirred solution of boronic acid 1 (1.25 equiv) and 2 (1.0 equiv) in anhydrous CH2Cl2 (1.6 mL/mmol 1) was added trifluoroacetic anhydride (0.3 equiv). After stirring overnight (18 h), a saturated solution of Na2CO3 was added. The layers were separated and the aqueous one was extracted with Et2O. The combined organic layers were dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane/CH2Cl2 25:75).
  • 39
  • [ 4363-35-3 ]
  • (E)-3-((S)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-1-phenyl-propenone [ No CAS ]
  • C19H20O3 [ No CAS ]
YieldReaction ConditionsOperation in experiment
80% With trifluoroacetic anhydride; In dichloromethane; at 25℃; for 18h; General procedure: To a stirred solution of boronic acid 1 (1.25 equiv) and 2 (1.0 equiv) in anhydrous CH2Cl2 (1.6 mL/mmol 1) was added trifluoroacetic anhydride (0.3 equiv). After stirring overnight (18 h), a saturated solution of Na2CO3 was added. The layers were separated and the aqueous one was extracted with Et2O. The combined organic layers were dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane/CH2Cl2 25:75).
  • 40
  • [ 1201186-54-0 ]
  • [ 4363-35-3 ]
  • [ 1421338-22-8 ]
  • 41
  • [ 1383674-30-3 ]
  • [ 4363-35-3 ]
  • [ 1416735-49-3 ]
YieldReaction ConditionsOperation in experiment
65% With tetrakis(triphenylphosphine) palladium(0); potassium carbonate; In toluene; at 90℃;Inert atmosphere; General procedure: To a suspension of degassed toluene (30.0 mL) and K2CO3 (9.2 mL of a 2 M solution) were added, under argon atmosphere, 4 (0.200 g, 0.31 mmol), boronic acid 5 (0.93 mmol, 3 equiv.) and a catalytic amount (1% m/m) of Pd(PPh3)4. The resulting mixture was heated at 90 C overnight, then cooled down to room temperature, and solvents were removed under reduced pressure at 80 C. The products 1 was purified from the crude reaction by precipitation with acetonitrile, and the solid was washed with water. All new compounds 1 were shown to be homogeneous by their TLC examination with different polarity elution mixtures (see Supporting Information - Part II).
  • 42
  • [ 20780-75-0 ]
  • [ 4363-35-3 ]
  • [ 1421701-17-8 ]
YieldReaction ConditionsOperation in experiment
93% With tetrakis(triphenylphosphine) palladium(0); sodium hydrogencarbonate; In 1,2-dimethoxyethane; water; at 130℃; for 0.0833333h;Microwave irradiation; Inert atmosphere; General procedure: General procedure for the synthesis of compounds 4-39; 4-Iodoisatin 1 (50.0 mg, 0.183 mmol) and 3a (22.3 mg, 0.183 mmol) were dissolved in DME (3 mL) and H2O (0.6 mL) in a microwave vial under a nitrogen atmosphere. Pd(PPh3)4 (5 mmol %, 11 mg) and sodium bicarbonate (30.7 mg, 0.366 mmol) were added, and the reaction mixture was irradiated in a microwave apparatus at 130 C for 4-12 min. After the reaction mixture was cooled to ambient temperature, the product was concentrated, and the crude mixture was purified by silica gel column chromatography using petroleum ether/acetone (20/1 to 10/1) as eluent to give the title compound 4. (E)-4-Styrylindoline-2,3-dione (42) Orange solid, 42.3 mg, 93% yield; mp: 230-231 C. 1H NMR (400 MHz, dmso) delta 9.01 (s, 1H), 5.88 (d, J = 16.8 Hz, 1H), 5.57-5.50 (m, 3H), 5.45 (dd, J = 6.8, 4.0 Hz, 2H), 5.37 (t, J = 7.6 Hz, 2H), 5.28 (t, J = 7.2 Hz, 1H), 4.68 (dd, J = 5.6, 2.8 Hz, 1H). 13C NMR (100 MHz, dmso) delta 184.69, 159.08, 150.65, 137.73, 137.37, 136.22, 134.26, 129.00, 128.91, 127.11, 121.98, 118.75, 113.98, 110.52. MS: m/z = 287.13 (M+). Anal. Calcd for (C16H11NO2): C, 77.10; H, 4.45; N, 5.62. Found: C, 77.18; H, 4.38; N, 5.40.
  • 43
  • [ 2402-79-1 ]
  • [ 4363-35-3 ]
  • 2,3,5,6-tetrastyrylpyridine [ No CAS ]
  • 44
  • [ 337463-88-4 ]
  • [ 4363-35-3 ]
  • [ 911485-89-7 ]
YieldReaction ConditionsOperation in experiment
24.3 g With tetrakis(triphenylphosphine) palladium(0); potassium carbonate; In 1,4-dioxane; water; for 24h;Reflux; Step 4To a degassed solution of 1.4 (28.9 g) in 1,4-dioxane (630 mL) and water (100 mL) was added phenylvinylboronic acid (19.2 g), potassium carbonate (35.6 g) andtetrakis(triphenylphosphine)palladium (4.42 g), the mixture was heated at reflux for 24 hours.After dilution of the mixture with water (720 mL), the resulting precipitates were collected by filtration and washed with water (180 mL). Flash chromatography (NH silica gel, hexane : 1,4- dioxane = 2: 1) of the crude product gave 1.5 (24.3 g).1H NMR (CDC13): delta 4.68 (s, 2H), 7.01 (d, J= 7.9 Hz, 1H), 7.03 (d, J= 15.9 Hz, 1H), 7.23 (d, J= 7.9Hz, 1H), 7.36 (t, J= 7.3 Hz, 2H), 7.46 (d, J= 15.9 Hz, 1H), 7.53 (d, J= 7.3 Hz, 1H), 8.09 (brs, 1H).
  • 45
  • methyl 2-bromo-1-methyl-1H-imidazole-4-carboxylate [ No CAS ]
  • [ 4363-35-3 ]
  • methyl 1-methyl-2-styryl-1H-imidazole-4-carboxylate [ No CAS ]
YieldReaction ConditionsOperation in experiment
57% With tetrakis(triphenylphosphine) palladium(0); sodium carbonate; In ethanol; water; toluene; at 90℃; for 16h;Inert atmosphere; A solution of methyl 2-bromo-1 -methyl-1 H-imidazole-4-carboxylate intermediate compound 140 (529 mg, 2.41 mmol), 2-phenylvinylboronic acid (2.41 mmol, 357 mg), tetrakis(triphenylphosphine)palladium (5 % w/w, 27 mg) and 2N aqueous sodium carbonate solution (8.21 mmol, 4 ml_) in toluene/ethanol (2:1 , 18 ml_) was degassed by argon and stirred at 90 5C for 16 h, then cooled to room temperature and concentrated. The reaction crude was purified using reverse C18 chromatography using water (0.1 % formic acid) and acetonitrile (0.1 % formic acid) as eluents to give methyl 1 -methyl-2-styryl-1 H-imidazole-4-carboxylate (337 mg, Yield: 57%). LC-MS: tR = 2.75 [M+H] + = 243 (method 3)
57% With tetrakis(triphenylphosphine) palladium(0); sodium carbonate; In ethanol; water; toluene; at 90℃; for 16h;Inert atmosphere; A solution of methyl 2-bromo-1-methyl-1H-imidazole-4-carboxylate 18, 2.41 mmol, 529 mg), 2-phenylvinylboronic acid (2.41 mmol, 357 mg), tetrakis(triphenylphosphine)palladium (5% w/w, 27 mg) and 2N aqueous sodium carbonate solution (8.21 mmol, 4 mL) in toluene/ethanol (2:1, 18 mL) was degassed by argon and heated at 90 C for 16 h, then cooled to RT and concentrated. The reaction crude was purified by reverse C18 chromatography using water (0.1% formic acid) and acetonitrile (0.1% formic acid) as eluents to give 337 mg (Yield: 57%) of methyl 1-methyl-2-styryl-1H-imidazole-4-carboxylate 19. 1H NMR (400 MHz, CDCl3): delta 8.11 (1H, s), 7.75 (1H, brs), 7.55 (2H, d, J = 7.2 Hz), 7.50 (1H, brs), 7.41-7.30 (3H, m), 7.28-7.23 (1, m), 3.93 (3H, s), 3.86 (3H, s); ESI-MS: m/z 243 [M + H]+
  • 46
  • [ 1565836-96-5 ]
  • [ 4363-35-3 ]
  • 1-(4-methyl-2-styryl-6-p-tolylpyrimidin-5-yl)ethanone [ No CAS ]
YieldReaction ConditionsOperation in experiment
90% Compound 3d(1 g, 3.83 mmol) was reacted as described in Section 2.1 to give 4d as yellow solid (0.417 g, 89%); Rf(20% EtOAc-Hexane) 0.75, blue spot; mp 86-88 C;1H NMR (400 MHz,DMSO) delta: 2.061 (s, 3H), 2.397 (s, 3H), 2.472 (s, 3H), 7.224-7.264 (d, J=16 Hz,2H,Ar-H), 7.295-7.348 (m, 3H,Ar-H), 7.371-7.411 (dd, J=1.2 Hz & 7.6Hz, , 2H,Ar-H),7.506-7.527 (d, J=8.4 Hz, 2H,Ar-H), 7.649-7.667 (d, 2H,Ar-H), 13CNMR (100 MHz, DMSO) delta: 20.96, 22.14, 31.59, 126.91, 127.4, 127.6, 128.5, 129.4,129.26, 129.89, 134.49, 135.4, 138.2, 140.20, 161.25, 162.8, 163.12 ; IR (KBr,cm-1): 2961, 2333, 1770, 1620, 1529, 1469, 813, 709. Anal. Calcd forC22H22ClN3O2: C, 80.46; H, 6.14; N,8.53. Found: C, 80.70; H, 6.42; N, 8.69.
  • 47
  • [ 1236568-49-2 ]
  • [ 4363-35-3 ]
  • [ 1590352-48-9 ]
YieldReaction ConditionsOperation in experiment
87% With tetrakis(triphenylphosphine) palladium(0); tetrabutylammomium bromide; sodium hydrogencarbonate; In water; toluene; at 120℃; for 0.1h;Inert atmosphere; Microwave irradiation; General procedure: Aryl iodide 1 (160 mg, 0.5 mmol) and 2a (61 mg, 0.5 mmol) were dissolved in toluene (3 mL) and H2O (0.6 mL) in a microwave vial under a nitrogen atmosphere. Pd(PPh3)4 (0.01 mmol, 11.56 mg), sodium bicarbonate (84 mg, 1 mmol), and tetrabutyl ammonium bromide (80.5 mg, 0.25 mmol) were added, and then the reaction mixture was irradiated in a microwave apparatus at 120 C for 6-13 min. After the reaction mixture was cooled to ambient temperature, the reaction mixture was concentrated, and the crude residue was purified by silica gel column chromatography using petroleum ether/acetone (20/1 to 10/1) as eluent to give the title compound 3a (123 mg) in 91% yield.
  • 48
  • [ 4363-35-3 ]
  • [ 5432-46-2 ]
  • [ 298-12-4 ]
  • [ 1588786-72-4 ]
YieldReaction ConditionsOperation in experiment
81% With triethylamine; In dichloromethane; at 22 - 25℃; for 24h; General procedure: A 50 mL round-bottom flask containing a magnetic stirring bar was charged with D-glucosamine hydrochloride 2a or its derivative 2b (1.0 mmol, 1 equiv.), glyoxylic acid hydrate (1.0 mmol, 1 equiv.), and alkenyl boronic acid (1.0 mmol, 1 equiv.). CH2Cl2 (5.0 mL) and triethylamine (1.0 mmol, 1 equiv.) were injected, and the suspension was stirred for 24 h at room temperature. The resulting mixture was filtered through a pad of silica gel with the help of CH2Cl2 (30 mL). The filtrate was concentrated, and the residue was purified by column chromatography (silica gel, EtOAc-PE) to afford the product 1 (see Supporting information).
  • 49
  • [ 1417366-35-8 ]
  • [ 4363-35-3 ]
  • 4,6,8-tris(2-phenylethenyl)quinoline-3-carbaldehyde [ No CAS ]
YieldReaction ConditionsOperation in experiment
71% With bis-triphenylphosphine-palladium(II) chloride; potassium carbonate; tricyclohexylphosphine; In 1,4-dioxane; water; at 80 - 90℃; for 3h;Inert atmosphere; General procedure: 6,8-Dibromo-4-chloroquinoline-3-carbaldehyde (1, 1 equiv.), phenylboronic acid (3.5 equiv.), PdCl2(PPh3)2 (10% of 1), PCy3 (20% of 1) and K2CO3 (3 equiv.) in dioxane-water (4:1, 15 mL/mmol of 1) were added to a two-necked flask equipped with a stirrer bar, rubber septum and a condenser. The mixture was flushed for 20 min with argon gas and a balloon filled with argon gas was connected to the top of the condenser. The mixture was heated with stirring at 80-90 C under argon atmosphere for 3 h and then allowed to cool to room temperature. The cooled mixture was poured into ice-cold water and the product was taken-up into chloroform. The combined organic extracts were washed with brine, dried over anhydrous MgSO4, filtered and then evaporated under reduced pressure. The residue was purified by column chromatography to afford 2. The following products were prepared in this fashion:
  • 50
  • [ 39806-90-1 ]
  • [ 4363-35-3 ]
  • (E)-1-methyl-4-styryl-1H-pyrazole [ No CAS ]
YieldReaction ConditionsOperation in experiment
76% With tetrakis(triphenylphosphine) palladium(0); caesium carbonate; In 1,2-dimethoxyethane; water; at 90℃; for 0.0833333h;Microwave irradiation; Inert atmosphere; General procedure: 4-Iodo-1-methyl-1H-pyrazole 1 (101 mg, 0.5 mmol) and phenylboronic 2 (59 mg, 0.5 mmol) were dissolved in DME (3 mL) and H2O (1.2 mL) in a microwave vial under a nitrogen atmosphere. Pd(PPh3)4 (2 mmol%, 11.6 mg) and Cs2CO3 (407.3 mg, 1.25 mmol) were added, and the reaction mixture was irradiated in a microwave apparatus at 90 C for 5-12 min. After the reaction mixture was cooled to ambient temperature, the product was concentrated, and the crude mixture was purified by silica gel column chromatography using petroleum ether/acetone as eluent to give the title compound.
  • 51
  • C11H16O5 [ No CAS ]
  • [ 4363-35-3 ]
  • diisopropyl (E)-2-oxo-4-styrylpentanedioate [ No CAS ]
YieldReaction ConditionsOperation in experiment
87% With L-Tartaric acid; In dichloromethane; at 60℃; for 18h; General procedure: To a stirred solution of boronic acid 2 (2.5 equiv) and enedicarbonyl compound 1 (1.0 equiv) in anhydrous CH2Cl2 (1.0 mL/mmol) was added tartaric acid. After stirring overnight (18 h) at 60 C, a saturated solution of Na2CO3 (10 mL) was added. The layers were separated and the aqueous layer was extracted with Et2O (3 × 10 mL). The combined organic layers were dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane-EtOAc, 8:2).
  • 52
  • C11H16O5 [ No CAS ]
  • [ 4363-35-3 ]
  • diisopropyl (E)-2-oxo-4-styrylpentanedioate [ No CAS ]
  • diisopropyl (2RS,4RS)-2-phenyl-3,4-dihydro-2H-pyran-4,6-dicarboxylate [ No CAS ]
YieldReaction ConditionsOperation in experiment
15%; 69% With trifluoroacetic anhydride; In dichloromethane; at 60℃; General procedure: To a stirred solution of boronic acid 2a (162.8 mg, 1.10 mmol) and 1a (100.0 mg 0.44 mmol) in anhydrous CH2Cl2 (0.4 mL) was added TFAA (16 muL, 0.11 mmol). After stirring overnight (18 h) at 60 C, a sat. solutionof Na2CO3 (10 mL) was added. The layers were separated and the aqueous layer was extracted with Et2O (3 × 10 mL). The combined organic layers were dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane-EtOAc, 8:2) to afford the title compound 4; yield: 111.2 mg (76%); colorless oil.
  • 53
  • C11H16O5 [ No CAS ]
  • [ 4363-35-3 ]
  • diisopropyl (2RS,4RS)-2-phenyl-3,4-dihydro-2H-pyran-4,6-dicarboxylate [ No CAS ]
YieldReaction ConditionsOperation in experiment
76% With trifluoroacetic anhydride; In dichloromethane; at 60℃; for 18h; To a stirred solution of boronic acid 2a (162.8 mg, 1.10 mmol) and 1a (100.0 mg 0.44 mmol) in anhydrous CH2Cl2 (0.4 mL) was added TFAA (16 muL, 0.11 mmol). After stirring overnight (18 h) at 60 C, a sat. solutionof Na2CO3 (10 mL) was added. The layers were separated and the aqueous layer was extracted with Et2O (3 × 10 mL). The combined organic layers were dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane-EtOAc, 8:2) to afford the title compound 4; yield: 111.2 mg (76%); colorless oil.
  • 54
  • C11H16O5 [ No CAS ]
  • [ 4363-35-3 ]
  • isopropyl 2-oxo-3-(2-oxo-5-phenyltetrahydrofuran-3-yl)propanoate [ No CAS ]
YieldReaction ConditionsOperation in experiment
34% With trifluoroacetic anhydride; In dichloromethane; at 60℃; for 18h; To a stirred solution of boronic acid 2a (162.8 mg, 1.10 mmol) and 1a (100.0 mg 0.44 mmol) in anhydrous CH2Cl2 (0.4 mL) was added TFAA (76 muL, 0.55 mmol). After stirring overnight (18 h) at 60 C, a sat. solution of Na2CO3 (10 mL) was added. The layers were separated and the aqueous layer was extracted with Et2O (3 × 10 mL). The combined organic layers were dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane-EtOAc, 8:2) to afford the title compound 5; yield: 43.4 mg (34%); yellow oil.
  • 55
  • C13H13ClO3 [ No CAS ]
  • [ 4363-35-3 ]
  • isopropyl (E)-2-[2-(4-chlorophenyl)-2-oxoethyl]-4-phenylbut-3-enoate [ No CAS ]
YieldReaction ConditionsOperation in experiment
98% With L-Tartaric acid; In dichloromethane; at 60℃; for 18h; General procedure: To a stirred solution of boronic acid 2 (2.5 equiv) and enedicarbonyl compound 1 (1.0 equiv) in anhydrous CH2Cl2 (1.0 mL/mmol) was added tartaric acid. After stirring overnight (18 h) at 60 C, a saturated solution of Na2CO3 (10 mL) was added. The layers were separated and the aqueous layer was extracted with Et2O (3 × 10 mL). The combined organic layers were dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography over silica gel (hexane-EtOAc, 8:2).
  • 56
  • [ 2441-97-6 ]
  • [ 4363-35-3 ]
  • C14H16 [ No CAS ]
YieldReaction ConditionsOperation in experiment
67% With [Rh(OH)(cod)]2; 2,2',6,6'-tetramethoxy-4,4'-bis(di(3,5-dimethylphenyl)phosphino)-3,3'-bipyridine; caesium carbonate; In tetrahydrofuran; at 60℃; for 1h; General procedure: General procedure for the AAA of allyl chlorides with boronic acids, [Rh(cod)(OH)]2 (4.6 mg, 0.01 mmol, 0.025 equiv.), A (18.2 mg, 0.024 mmol, 0.06 equiv.) and Cs2CO3 (130.3 mg, 0.40 mmol, 1.00 equiv.) were stirred in THF (2 ml) in a 10 ml round-bottomed flask at 60 C for 30 minutes. A solution of the boronic acid (0.80 mmol, 2.00 equiv.) and the allyl chloride (0.40 mmol, 1.00 equiv.) in THF (1.5 ml) was then added via syringe and the flask rinsed with THF (0.5 ml). The resulting mixture was stirred for one hour at 60 C before the addition of SiO2 (20 mg). The solvent was then evaporated carefully and the solid loaded directly onto a flash chromatography column to obtain the purified product.
  • 57
  • [ 61948-60-5 ]
  • [ 4363-35-3 ]
  • 2-chloro-8-methoxy-4-strylquinazoline [ No CAS ]
  • 58
  • [ 1439840-86-4 ]
  • [ 4363-35-3 ]
  • C17H16N2O3S [ No CAS ]
  • C17H16N2O3S [ No CAS ]
  • 59
  • [ 55660-68-9 ]
  • [ 4363-35-3 ]
  • [ 20488-43-1 ]
YieldReaction ConditionsOperation in experiment
49% With potassium phosphate; palladium diacetate; XPhos; In tetrahydrofuran; at 80℃; for 9h;Inert atmosphere; Sealed tube; To a solution of aryl nosylate (1 equiv) in dry and degassed THF (6 mL/mmol) under inert atmosphere were added successively boronic acid (2 equiv), Pd(OAc)2 (2 mol %), 2-dicyclohexylphosphino-2?,4?,6?-triisopropylbiphenyl (XPhos) (4 mol %) and potassium phosphate (2.8 equiv). The flask was sealed and the mixture was stirred at 80 C under inert atmosphere until consumption of the starting material. The reaction mixture was diluted with ethyl acetate and the suspension was filtered over Celite. The filtrate was concentrated under reduced pressure and the crude residue was purified by chromatography on silica gel (Cyclohexane/Ethyl Acetate).
  • 60
  • [ 591-11-7 ]
  • [ 4363-35-3 ]
  • 5-methyl-4((E)-styryl)dihydrofuran-2(3H)-one [ No CAS ]
  • 61
  • [ 4363-35-3 ]
  • [ 101349-79-5 ]
YieldReaction ConditionsOperation in experiment
85% With perfluoroisopropyl iodide; copper; hydroquinone; In N,N-dimethyl-formamide; at 20℃; for 24h; General procedure: (4-Nitrophenyl)boronic acid (0.067 g, 0.4 mmol), copper powder (0.0052 g, 0.08 mmol,), (CF3)2CFI (0.178 g, 0.6 mmol), and DMF (2 mL) were placed in a closed tube with a rubber stopper. The mixture was reacted at room temperature equipped with an air balloon for 24 h. The resulting suspension was poured into water and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4 and concentrated to dryness. The crude product was purified by flash column chromatography on silica gel using petroleum ether/ethyl acetate = 20: 1 (v/v) as eluent to give 0.086 g of 2j as a light yellow solid (0.35 mmol, 87%).
  • 62
  • [ 4363-35-3 ]
  • [ 118438-98-5 ]
  • diethyl((2E,4E)-1,1-difluoro-3-methyl-5-phenylpenta-2,4-dien-1-yl)phosphonate [ No CAS ]
YieldReaction ConditionsOperation in experiment
94% With palladium diacetate; triphenylphosphine; In 1,4-dioxane; at 50℃;Inert atmosphere; Example 4 Under the protection of N2 was added Pd(OAc)2 (2.2mg, 0.01mmol), PPh3 (5.2mg, 0.02mmol), <strong>[4363-35-3]styrylboronic acid</strong> (0.4mmol), alpha,alpha-difluoromethylyl-beta-allenephosphonic acid diethyl ester (45.2mg, 0.2mmol), and 2mL 1,4- dioxane. The mixture was placed in an oil bath at 50C. TLC was used to monitor the reaction until alpha,alpha-difluoromethylyl-beta-allenephosphonic acid diethyl ester disappeared. 10mL of water was added to quench the reaction. The mixture was extracted with ethyl acetate (5mL × 3). The organic phase was washed with water and saturated brine, dried over anhydrous sodium sulfate, subjected to petroleum ether - ethyl acetate to column chromatography to obtain the product. The resulting alpha,alpha-difluoromethylene phosphonate alkenyl group having the structure of formula, yield 94%.
  • 63
  • [ 337463-88-4 ]
  • [ 4363-35-3 ]
  • [ 443956-10-3 ]
YieldReaction ConditionsOperation in experiment
76% With tetrakis(triphenylphosphine) palladium(0); potassium carbonate; In 1,4-dioxane; water; for 24h;Reflux; To a degassed solution of D5 (28.9 g 126 mmol) in 1,4-dioxane (630 mL) and water (100 mL) was added phenylvinylboronic acid (19.2 g, 126 mmol), potassium carbonate (35.6 g, 252 mmol) and tetrakis(triphenylphosphine)palladium (4.42 g, 3.79 mmol). The mixture was heated at reflux for 24 hours. After addition of water (720 mL) the resulting precipitates were collected by filtration and washed with water (180 mL). Flash column chromatography (NH silica-gel, hexane/ 1,4-dioxane = 2: 1) of the crude product gave D6 (24.3 g, 76%). 1H NMR (400 MHz, CDC13) 54.68 (s, 2H), 7.01 (d, J= 7.9 Hz, 1H), 7.03 (d, J = 15.9 Hz, 1H), 7.23 (d, J = 7.9 Hz, 1H), 7.36 (t, J = 7.3 Hz, 2H), 7.46 (d, J = 15.9 Hz, 1H), 7.53 (d, J= 7.3 Hz, 1H), 8.09 (brs, 1H).
  • 64
  • [ 10557-85-4 ]
  • [ 4363-35-3 ]
  • (E)-N-(4,6-dimethyl-7-phenyl-5-(4-styryl)-1,3-oxazepin-2-yl)-N-(4-methoxybenzyl)methanesulfonamide [ No CAS ]
  • 66
  • [ 4363-35-3 ]
  • [ 71730-46-6 ]
  • C15H13NO3S [ No CAS ]
YieldReaction ConditionsOperation in experiment
91% With nickel(II) perchlorate hexahydrate; C30H28NOP; In 2,2,2-trifluoroethanol; at 70℃; for 48h; In a 80 mL test tube,Phosphine ligand L6Ac (6.7 mg, 0.015 mmol)And hexahydrate hexahydrate (3.5 mg, 0.010 mmol)Add 1 mL of unrefined trifluoroethanol,The solution was stirred at 60 & lt; 0 & gt; C for 10 min,A solution of organic boronic acid 1AB (21.6 mg, 0.3 mmol)With sulfonylimide substrate 2a (36.6 mg, 0.2 mmol),Followed by addition of 1 mL of unrefined trifluoroethanol, and the solution was stirred at 70 C for 48 hours. Rotate the solvent and column chromatography to give the product 3ABa.The yield was 91% and the enantiomeric excess was 94%.
  • 67
  • 1-benzyl-5-(benzylamino)-6-oxo-1,6-dihydropyridazin-3-yl 4-methylbenzenesulfonate [ No CAS ]
  • [ 4363-35-3 ]
  • 2-benzyl-4-(benzylamino)-6-styrylpyridazin-3(2H)-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
79% With palladium diacetate; potassium hydroxide; In water; at 75℃; for 5h; General procedure: A mixture of compound 3a (1 mmol), appropriate boronic acid derivative (1.05 mmol) and Pd(OAc)2 (1 mol%) in water was stirred at room temperature. After 5 min, KOH was added and the temperature was gradually increased up to 75 C. The reaction was stirred for 5 hr. After the reaction is completed the mixture was filtered and acidified with HCl and filtered again. The obtained solid was recrystallized from hot water to obtain compound 4a-d.
  • 68
  • [ 1006-94-6 ]
  • [ 4363-35-3 ]
  • [ 18107-18-1 ]
  • 5-methoxy-2-(1-phenylallyl)indoline [ No CAS ]
YieldReaction ConditionsOperation in experiment
98% With water; In hexane; dichloromethane; at 60℃; for 8h;Inert atmosphere; Sealed tube; General procedure: A microwave vial was charged with the indole (0.25 mmol, 1 eq.) and the correspondingvinyl boronic acid (0.625 mmol, 2.5 eq.). The flask was flushed with argon and sealed.The degassed solvent was added (2.5 mL) followed by the addition of water (3 mmol, 1.2eq.). Next, a 2 M TMSCHN2 solution in n-hexanes was added (1.25 mmol, 5 eq.) undervigorous agitation. The final mixture was heated at 60 C for 8 h in a Biotage Initiatormicrowave reactor, or in a sand-bath at 60 C when specified. The reactions wheremonitored by TLC analysis and quenched in methanol when the reaction was completedor when no more conversion was observed. The volatiles were removed under reduced pressure and the residue obtained was purified by flash column chromatography usingpetroleum ether/ethyl acetate. 5-methoxy-2-(1-phenylallyl)indoline (4a)Prepared according to the general procedure under microwave irradiation in 87% yield,obtained as a light-yellow oil. The reaction carried out in a sand-bath afforded theproduct in 98% yield (measured with 1H NMR analysis using 1,4-dinitrobenzene asinternal standard). 1H NMR (600 MHz, CDCl3): delta 7.31-7.36 (m, 2H), 7.23-7.26 (m, 1H),7.20-7.23 (m, 2H), 6.63-6.66 (m, 1H), 6.58-6.61 (m, 1H), 6.54-6.58 (m, 1H), 6.03-6.11(m, 1H), 6.01-6.13 (m, 1H), 5.16-5.21 (m, 2H), 4.07 (td, J = 8.9, 6.9 Hz, 1H), 3.73 (s, 3H),3.33 (t, J = 9.0 Hz, 1H), 2.84 (dd, J = 15.8, 8.6 Hz, 1H), 2.66 (dd, J = 15.9, 6.7 Hz, 1H); 13CNMR (151 MHz, CDCl3): delta 153.6, 144.4, 141.9, 139.7, 130.1, 129.0, 128.2, 126.9, 117.1,112.3, 112.0, 109.8, 63.4, 56.2, 56.1, 34.8; IR (ATR, cm-1): 3366 (w), 3061 (w), 3028 (w),2939 (w), 2830 (w), 1635 (w), 1599 (m), 1489 (s), 1466 (m), 1451 (s), 1433 (s), 1398(w), 1359 (w), 1293 (w), 1229 (s, br), 1138 (s), 1138 (s), 1032 (s), 992 (w), 919 (m),886 (w), 835 (m), 800 (m), 735 (m), 700 (s), 678 (m); HRMS (ESI +): m/z calculated forC18H19NO+ [M+H]+ 266.1545; found 266.1547.
  • 69
  • [ 120-72-9 ]
  • [ 4363-35-3 ]
  • [ 18107-18-1 ]
  • 2-(1-phenylallyl)indoline [ No CAS ]
YieldReaction ConditionsOperation in experiment
76% With water; In hexane; dichloromethane; at 60℃; for 8h;Inert atmosphere; Sealed tube; General procedure: A microwave vial was charged with the indole (0.25 mmol, 1 eq.) and the correspondingvinyl boronic acid (0.625 mmol, 2.5 eq.). The flask was flushed with argon and sealed.The degassed solvent was added (2.5 mL) followed by the addition of water (3 mmol, 1.2eq.). Next, a 2 M TMSCHN2 solution in n-hexanes was added (1.25 mmol, 5 eq.) undervigorous agitation. The final mixture was heated at 60 C for 8 h in a Biotage Initiatormicrowave reactor, or in a sand-bath at 60 C when specified. The reactions wheremonitored by TLC analysis and quenched in methanol when the reaction was completedor when no more conversion was observed. The volatiles were removed under reduced pressure and the residue obtained was purified by flash column chromatography usingpetroleum ether/ethyl acetate.
  • 70
  • [ 614-96-0 ]
  • [ 4363-35-3 ]
  • [ 18107-18-1 ]
  • 5-methyl-2-(1-phenylallyl)indoline [ No CAS ]
YieldReaction ConditionsOperation in experiment
66% With water; In hexane; dichloromethane; at 60℃; for 8h;Inert atmosphere; Sealed tube; General procedure: A microwave vial was charged with the indole (0.25 mmol, 1 eq.) and the correspondingvinyl boronic acid (0.625 mmol, 2.5 eq.). The flask was flushed with argon and sealed.The degassed solvent was added (2.5 mL) followed by the addition of water (3 mmol, 1.2eq.). Next, a 2 M TMSCHN2 solution in n-hexanes was added (1.25 mmol, 5 eq.) undervigorous agitation. The final mixture was heated at 60 C for 8 h in a Biotage Initiatormicrowave reactor, or in a sand-bath at 60 C when specified. The reactions wheremonitored by TLC analysis and quenched in methanol when the reaction was completedor when no more conversion was observed. The volatiles were removed under reduced pressure and the residue obtained was purified by flash column chromatography usingpetroleum ether/ethyl acetate.
  • 71
  • [ 399-52-0 ]
  • [ 4363-35-3 ]
  • [ 18107-18-1 ]
  • 5-fluoro-2-(1-phenylallyl)indoline [ No CAS ]
YieldReaction ConditionsOperation in experiment
54% With water; In hexane; dichloromethane; at 60℃; for 8h;Inert atmosphere; Sealed tube; General procedure: A microwave vial was charged with the indole (0.25 mmol, 1 eq.) and the correspondingvinyl boronic acid (0.625 mmol, 2.5 eq.). The flask was flushed with argon and sealed.The degassed solvent was added (2.5 mL) followed by the addition of water (3 mmol, 1.2eq.). Next, a 2 M TMSCHN2 solution in n-hexanes was added (1.25 mmol, 5 eq.) undervigorous agitation. The final mixture was heated at 60 C for 8 h in a Biotage Initiatormicrowave reactor, or in a sand-bath at 60 C when specified. The reactions wheremonitored by TLC analysis and quenched in methanol when the reaction was completedor when no more conversion was observed. The volatiles were removed under reduced pressure and the residue obtained was purified by flash column chromatography usingpetroleum ether/ethyl acetate.
  • 72
  • [ 1418634-11-3 ]
  • [ 4363-35-3 ]
  • (R,E)-8-methyl-4-styryl-3,4-dihydrobenzo[e][1,2,3]oxathiazine 2,2-dioxide [ No CAS ]
YieldReaction ConditionsOperation in experiment
90% With nickel(II) perchlorate hexahydrate; C28H28NOPRu; In 2,2,2-trifluoroethanol; for 48h;Reflux; General procedure: A test tube (20 mL) was charged with Ni(ClO4)2·6H2O (3.5 mg, 0.010 mmol, 0.050 equiv), L3a (7.9 mg, 0.015 mmol, 0.075 equiv) and unpurified TFE (1.0 mL). The solution was stirred at reflux for 0.5 h, then substrate (0.20 mmol, 1.0 equiv) and alkenylboronic acid (0.30 mmol, 1.5 equiv) were added into the tube. The wall of the tube was rinsed with an additional portion of TFE (1.0 mL). After stirring at reflux for 48 h in air, the reaction mixture was cooled to room temperature and the solvent was removed by rotary evaporation. The residue was purified by preparative TLC on silica gel (petroleum ether/EtOAc = 5/1) to give the product.
  • 73
  • [ 1449600-82-1 ]
  • [ 4363-35-3 ]
  • (R,E)-8-ethoxy-4-styryl-3,4-dihydrobenzo[e][1,2,3]oxathiazine 2,2-dioxide [ No CAS ]
YieldReaction ConditionsOperation in experiment
86% With nickel(II) perchlorate hexahydrate; C28H28NOPRu; In 2,2,2-trifluoroethanol; for 48h;Reflux; General procedure: A test tube (20 mL) was charged with Ni(ClO4)2·6H2O (3.5 mg, 0.010 mmol, 0.050 equiv), L3a (7.9 mg, 0.015 mmol, 0.075 equiv) and unpurified TFE (1.0 mL). The solution was stirred at reflux for 0.5 h, then substrate (0.20 mmol, 1.0 equiv) and alkenylboronic acid (0.30 mmol, 1.5 equiv) were added into the tube. The wall of the tube was rinsed with an additional portion of TFE (1.0 mL). After stirring at reflux for 48 h in air, the reaction mixture was cooled to room temperature and the solvent was removed by rotary evaporation. The residue was purified by preparative TLC on silica gel (petroleum ether/EtOAc = 5/1) to give the product.
  • 74
  • C8H6BrNO4S [ No CAS ]
  • [ 4363-35-3 ]
  • (R,E)-6-bromo-8-methoxy-4-styryl-3,4-dihydrobenzo[e][1,2,3]oxathiazine 2,2-dioxide [ No CAS ]
YieldReaction ConditionsOperation in experiment
87% With nickel(II) perchlorate hexahydrate; C28H28NOPRu; In 2,2,2-trifluoroethanol; for 48h;Reflux; General procedure: A test tube (20 mL) was charged with Ni(ClO4)2·6H2O (3.5 mg, 0.010 mmol, 0.050 equiv), L3a (7.9 mg, 0.015 mmol, 0.075 equiv) and unpurified TFE (1.0 mL). The solution was stirred at reflux for 0.5 h, then substrate (0.20 mmol, 1.0 equiv) and alkenylboronic acid (0.30 mmol, 1.5 equiv) were added into the tube. The wall of the tube was rinsed with an additional portion of TFE (1.0 mL). After stirring at reflux for 48 h in air, the reaction mixture was cooled to room temperature and the solvent was removed by rotary evaporation. The residue was purified by preparative TLC on silica gel (petroleum ether/EtOAc = 5/1) to give the product.
  • 75
  • [ 1169882-37-4 ]
  • [ 4363-35-3 ]
  • (R,E)-6-methoxy-4-styryl-3, 4-dihydrobenzo[e][1, 2, 3]oxathiazine 2, 2-dioxide [ No CAS ]
YieldReaction ConditionsOperation in experiment
87% With nickel(II) perchlorate hexahydrate; C28H28NOPRu; In 2,2,2-trifluoroethanol; for 48h;Reflux; General procedure: A test tube (20 mL) was charged with Ni(ClO4)2·6H2O (3.5 mg, 0.010 mmol, 0.050 equiv), L3a (7.9 mg, 0.015 mmol, 0.075 equiv) and unpurified TFE (1.0 mL). The solution was stirred at reflux for 0.5 h, then substrate (0.20 mmol, 1.0 equiv) and alkenylboronic acid (0.30 mmol, 1.5 equiv) were added into the tube. The wall of the tube was rinsed with an additional portion of TFE (1.0 mL). After stirring at reflux for 48 h in air, the reaction mixture was cooled to room temperature and the solvent was removed by rotary evaporation. The residue was purified by preparative TLC on silica gel (petroleum ether/EtOAc = 5/1) to give the product.
  • 76
  • [ 1401912-25-1 ]
  • [ 4363-35-3 ]
  • (R,E)-6-fluoro-4-styryl-3,4-dihydrobenzo[e][1,2,3]oxathiazine 2,2-dioxide [ No CAS ]
YieldReaction ConditionsOperation in experiment
90% With nickel(II) perchlorate hexahydrate; C28H28NOPRu; In 2,2,2-trifluoroethanol; for 48h;Reflux; General procedure: A test tube (20 mL) was charged with Ni(ClO4)2·6H2O (3.5 mg, 0.010 mmol, 0.050 equiv), L3a (7.9 mg, 0.015 mmol, 0.075 equiv) and unpurified TFE (1.0 mL). The solution was stirred at reflux for 0.5 h, then substrate (0.20 mmol, 1.0 equiv) and alkenylboronic acid (0.30 mmol, 1.5 equiv) were added into the tube. The wall of the tube was rinsed with an additional portion of TFE (1.0 mL). After stirring at reflux for 48 h in air, the reaction mixture was cooled to room temperature and the solvent was removed by rotary evaporation. The residue was purified by preparative TLC on silica gel (petroleum ether/EtOAc = 5/1) to give the product.
  • 77
  • [ 4363-35-3 ]
  • [ 78224-92-7 ]
  • [ 1393377-49-5 ]
YieldReaction ConditionsOperation in experiment
96% With nickel(II) perchlorate hexahydrate; C28H28NOPRu; In 2,2,2-trifluoroethanol; for 48h;Reflux; General procedure: A test tube (20 mL) was charged with Ni(ClO4)2·6H2O (3.5 mg, 0.010 mmol, 0.050 equiv), L3a (7.9 mg, 0.015 mmol, 0.075 equiv) and unpurified TFE (1.0 mL). The solution was stirred at reflux for 0.5 h, then substrate (0.20 mmol, 1.0 equiv) and alkenylboronic acid (0.30 mmol, 1.5 equiv) were added into the tube. The wall of the tube was rinsed with an additional portion of TFE (1.0 mL). After stirring at reflux for 48 h in air, the reaction mixture was cooled to room temperature and the solvent was removed by rotary evaporation. The residue was purified by preparative TLC on silica gel (petroleum ether/EtOAc = 5/1) to give the product.
  • 78
  • [ 4363-35-3 ]
  • [ 115540-65-3 ]
  • (R,E)-6-bromo-4-styryl-3, 4-dihydrobenzo[e][1,2,3]oxathiazine 2,2-dioxide [ No CAS ]
YieldReaction ConditionsOperation in experiment
94% With nickel(II) perchlorate hexahydrate; C28H28NOPRu; In 2,2,2-trifluoroethanol; for 48h;Reflux; General procedure: A test tube (20 mL) was charged with Ni(ClO4)2·6H2O (3.5 mg, 0.010 mmol, 0.050 equiv), L3a (7.9 mg, 0.015 mmol, 0.075 equiv) and unpurified TFE (1.0 mL). The solution was stirred at reflux for 0.5 h, then substrate (0.20 mmol, 1.0 equiv) and alkenylboronic acid (0.30 mmol, 1.5 equiv) were added into the tube. The wall of the tube was rinsed with an additional portion of TFE (1.0 mL). After stirring at reflux for 48 h in air, the reaction mixture was cooled to room temperature and the solvent was removed by rotary evaporation. The residue was purified by preparative TLC on silica gel (petroleum ether/EtOAc = 5/1) to give the product.
  • 79
  • [ 106-38-7 ]
  • [ 4363-35-3 ]
  • [ 4714-21-0 ]
YieldReaction ConditionsOperation in experiment
94% With C23H24Cl2N4Pd; potassium hydroxide; In ethanol; at 22℃; for 24h; General procedure: Glass reactor (2 mL) equipped with a reflux condenser and magnetic stirrer was charged in air with boronic acid (2.5 10-4 mol, 1.05 equiv.) and 1 mL of ethanol (99.8%). The mixture was stirred at 22 C for 5 minutes until complete dissolution of the acid. Then aryl halide (1 equiv.), dodecane (internal standard), appropriate palladium complex and KOH (1.1 equiv.) were added. The mixture was stirred at 22 C or in reflux (in a closed system) for 24 h. The course of the reaction was monitored by gas chromatography and GC/MS. After completion of the reaction, 2 mL of water and 2 mL of hexane were added to the reaction mixture. Unless stated otherwise, product was isolated from the organic layer by column chromatography (SiO2, hexane). The reaction products were identified on the basis of their spectroscopic characteristics.
  • 80
  • [ 52166-26-4 ]
  • [ 4363-35-3 ]
  • [ 1227000-53-4 ]
YieldReaction ConditionsOperation in experiment
62% With dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; potassium phosphate; palladium diacetate; In tetrahydrofuran; at 60℃; for 12h; General procedure: Pd(OAc)2 (6 mg, 0.027 mmol), 22 mg dicyclohexylphosphino-2',6'-dimethoxy-1,1'-biphenyl (SPhos, 0.053 mmol) were added to 25 cm3 THF. The solution was stirred for 30 min. Iodoquinolone 7 (0.15 g, 0.53 mmol), boronic acid (8a, 8b, 8c, 8d, 8e, or 8f, 0.53 mmol), and anhydrous K3PO4 (1.59 mmol) were added subsequently. The mixture was heated to 60 C with stirring for 12 h. The mixture was cooled to room temperature and then was filtered through a thin pad of silica gel eluting with EtOAc (3 9 10 cm3). The filtrate was concentrated under reduced pressure using rotavapor and the crude residue was purified by columnchromatography on silica gel (hexane:EtOAc, 7:3).
  • 81
  • [ 4363-35-3 ]
  • [ 1614-12-6 ]
  • (E)-2-((1H-benzo[d][1,2,3]triazol-1-yl)imino)-1-phenylethanone [ No CAS ]
  • 82
  • [ 18791-78-1 ]
  • [ 4363-35-3 ]
  • C13H10OS [ No CAS ]
YieldReaction ConditionsOperation in experiment
77% With dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; potassium phosphate; tris-(dibenzylideneacetone)dipalladium(0); In water; toluene; at 95℃; General procedure: DNT-1221 derivatives 32-36 were synthesized using the route shown in Scheme 3. Formylation with n-butyllithium and DMF was used to convert 3,4-dibromothiophene to <strong>[18791-78-1]3-bromothiophene-4-carbaldehyde</strong> 23 in 77% yield.[38,39] Suzuki-Miyaura coupling was then used to add the first styryl group to one side of the thiophene ring to give 3-formyl-4-styrylthiophenes 24-26 in 10-77% yield (Table 5), from which asymmetric distyrylthiophenes could easily be synthesized. The trifluoromethyl-substituted styrylboronic acid gave the highest yields. A Horner-Wadsworth-Emmons reaction was used to add the second substituted styryl group to the other side of the thiophene ring (Table 6), creating 3,4-distyrylthiophenes 27-31 in yields from 16-95%. The CF3-substituted benzylphosphonic esters used in the creation of 29 and 30 gave higher yields compared to those with other substituents. The Suzuki-Miyaura coupling was performed before the Horner-Wadsworth-Emmons reaction in this route because the 1,4-diphenyl-1,3-butadiene byproducts formed from the Suzuki-Miyaura reaction were easier to separate from the more polar 3-formyl-4-styrylthiophenes than from 3,4-distyrylthiophenes. An oxidative photocyclization was then used in the same manner as the previous routes to fuse the rings together to give DNT-1221 derivatives 32-36 in yields of 6-20% (Table 7).
  • 83
  • [ 62325-30-8 ]
  • [ 4363-35-3 ]
  • 2,7-di(styryl)phenanthrene [ No CAS ]
YieldReaction ConditionsOperation in experiment
78.69% With tetrakis(triphenylphosphine) palladium(0); sodium carbonate; In water; toluene; at 90℃; for 24h;Inert atmosphere; Styrylboronic acid (0.33 g, 2.2 mmol, 2.2 eq.), 2,7-dibromophenanthrene(0.34 g, 1 mmol, 1 eq.), Na2CO3 (2.0 M)and Pd(PPh3)4 (0.058 g, 0.05 mmol, 5% eq.) were added to atwo-neck bottle under N2. Toluene (8 mL) and H2O (4 mL)were added and then heated to 90 C and stirred for 24 h. Thesystem was then filtered, washed successively with dichloromethane,water, and ethanol and purified by sublimation[21]. DSPa was obtained as a white solid, with ayield of 78.69%. 1HNMR (600 MHz, CDCl3): delta (ppm) 8.64(d, 2H), 7.94 (d, 2H), 7.88 (dd, 2H), 7.75 (s, 2H), 7.60 (m,4H), 7.40 (t, 4H), 7.31 (m, 6H). MALDI-TOF: 381.7; Anal.calculated for C30H22 (%): C 94.20%, H 5.80%. Experimental:C 94.33%, H 5.57%.
  • 84
  • [ 4363-35-3 ]
  • 5-(benzyloxy)-2-halobenzaldehyde [ No CAS ]
  • C22H18O2 [ No CAS ]
  • 85
  • [ 4363-35-3 ]
  • 5-bromo-7-iodo-3-methyl-1H-indazole [ No CAS ]
  • 5-bromo-3-methyl-7-styryl-1H-indazole [ No CAS ]
YieldReaction ConditionsOperation in experiment
67% With bis-triphenylphosphine-palladium(II) chloride; tricyclohexylphosphine; In ethanol; toluene; at 80℃;Inert atmosphere; Sealed tube; Alkaline conditions; General procedure: A mixture of 2 (1 equiv.), arylboronic acid (1.2 equiv.),PdCl2(PPh3)2 (5 mol %), K2CO3 (1.5 equiv.) in 4:1 toluene-ethanol (v/v,15 mL) was placed in a 2 necked flask equipped with a stirrer bar,rubber septum and a condenser. The mixture was flushed with argongas for 5 min and a balloon filled with argon gas was connected to thetop of a condenser. The mixture was then stirred at 80 C for 5 h, cooledto RT and then quenched with an ice cold water. The product was extractedwith chloroform and the combined organic layers were driedwith MgSO4, filtered and purified by silica gel column chromatographyto afford 3 as a solid. The following compounds were prepared in thisfashion:
  • 86
  • [ 131359-24-5 ]
  • [ 4363-35-3 ]
  • C25H20O2 [ No CAS ]
  • C25H20O2 [ No CAS ]
  • 87
  • [ 4363-35-3 ]
  • [ 286-20-4 ]
  • C14H18O [ No CAS ]
YieldReaction ConditionsOperation in experiment
80% With nickel(II) bromide 2-methoxyethyl ether complex; 4,4'-di-tert-butyl-2,2'-bipyridine; sodium iodide; In ethanol; at 70℃; for 12h;Inert atmosphere; Sealed tube; (1) nickel (II) bromide (10 mol%) in air,4,4?-di-tert-butyl-2,2?bipyridine (12 mol%),Sodium iodide (50 mol%) was added to a sealed reaction tube with a branch tube and containing magnetons. The reaction tube was flushed with argon three times. Under the protection of argon, 0.8 mL of ethanol was added to the reaction tube, and then <strong>[4363-35-3]styrylboronic acid</strong> (0.5 mmol) and epoxycyclohexane (0.25 mmol) were sequentially added to the reaction solution under the protection of argon.Plug the plunger and place in a 70 C oil bath for 12 hours with stirring.(2) The material obtained in step (1) was added to ethyl acetate and mixed thoroughly. After filtering off the solid residue with a short silica gel column, the organic phase was retained. The solvent in the organic phase was spin-dried to obtain a crude product, which was then purified using a silica gel column. Isolated yield is 80%, product purity is 100%
  • 88
  • [ 4363-35-3 ]
  • (E)-(4-styryl-1H-pyrrol-3-yl)(3,4,5-trimethoxyphenyl)methanone [ No CAS ]
  • (1-phenyl-4-styryl-1H-pyrrol-3-yl)(3,4,5-trimethoxyphenyl)methanone [ No CAS ]
YieldReaction ConditionsOperation in experiment
62% With copper diacetate; triethylamine; In dichloromethane; at 20℃; for 18h; General procedure: A solution of 4-phenyl-1H-pyrrol-3-yl)(3,4,5-trimethoxyphenyl)methanone (90) (0.30g, 0.8mmol), 2-methylphenylboronic acid (0.20g, 1.16mmol), copper(II) acetate (0.15g, 0.8mmol) and triethylamine (0.15mL) in dichloromethane (3.6mL) was stirred at room temperature for 18h under an Ar stream. The reaction mixture was diluted with water and extracted with ethyl acetate; the organic layer was washed with brine, dried and filtered. Removal of the solvent gave a residue that was purified by column chromatography (silica gel, n-hexane:ethyl acetate 2:1 as eluent) to furnish 2 (yield 33%, 0.04g)
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