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CAS No. : | 824-54-4 | MDL No. : | MFCD04039890 |
Formula : | C8H7BrO | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | MUZMDYCVUCMIDC-UHFFFAOYSA-N |
M.W : | 199.04 | Pubchem ID : | 4645292 |
Synonyms : |
|
Num. heavy atoms : | 10 |
Num. arom. heavy atoms : | 6 |
Fraction Csp3 : | 0.12 |
Num. rotatable bonds : | 1 |
Num. H-bond acceptors : | 1.0 |
Num. H-bond donors : | 0.0 |
Molar Refractivity : | 44.5 |
TPSA : | 17.07 Ų |
GI absorption : | High |
BBB permeant : | Yes |
P-gp substrate : | No |
CYP1A2 inhibitor : | Yes |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | No |
Log Kp (skin permeation) : | -5.78 cm/s |
Log Po/w (iLOGP) : | 1.84 |
Log Po/w (XLOGP3) : | 2.44 |
Log Po/w (WLOGP) : | 2.57 |
Log Po/w (MLOGP) : | 2.52 |
Log Po/w (SILICOS-IT) : | 3.12 |
Consensus Log Po/w : | 2.5 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 2.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -2.99 |
Solubility : | 0.204 mg/ml ; 0.00102 mol/l |
Class : | Soluble |
Log S (Ali) : | -2.44 |
Solubility : | 0.72 mg/ml ; 0.00362 mol/l |
Class : | Soluble |
Log S (SILICOS-IT) : | -3.59 |
Solubility : | 0.0512 mg/ml ; 0.000257 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 1.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 1.29 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* 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.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | at 55℃; for 1 h; Microwave irradiation | General procedure: The benzyl alcohols substrates (1a–1p) (0.2mmol), FeCl3·6H2O (0.002mmol, 5.4mg) and triphenylmethanol 2 (0.2mmol, 52mg) were mixed in a dried vessel. Then the reaction was irradiated under the microwave at 55°C for 1h. The crude mixture was purified by a flash column chromatography to afford the benzaldehydes (4a–4p). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
45% | at 170℃; for 0.075 h; Microwave irradiation | 2-Formyl-5-methyl-benzonitrile (III-G). 2-Bromo-4-methylbenzaldehyde VII-G (2.5 g, 12.3 mmol), CuCN (5.52 g, 61.6 mmol) and NiBr2 (807.0 mg, 3.69 mmol) were dissolved in 50 mL NMP. The reaction mixture was irradiated in a microwave oven for 4.5 min (T=170° C., pmax=17 bar, 200 W, powermax on). Next, the reaction mixture was poured into H2O (600 mL) and extracted with CH2Cl2 (3*600 mL). The combined organic phases were dried on MgSO4, evaporated in vacuo and purified by flash chromatography over silicagel (Hexane/EtOAc, 70/30) resulting in pure III-G, 790.6 mg (45percent). 1H-NMR (300 MHz, CDCl3): δ 2.48 (s, 3H), 7.56 (d, J=8.0 Hz, 1H), 7.62 (s, 1H), 7.93 (d, J=8.0 Hz, 1H), 10.28 (s, 1H) ppm. 13C-NMR (75.4 MHz, CDCl3): δ 21.5 (CH3), 113.9 (C), 116.1 (C), 129.6 (CH), 133.9 (CH), 134.4 (CH), 134.6 (C), 145.8 (C), 188.3 (CH) ppm. IR (HATR): 3194, 2222, 1697, 1597, 1573, 1452, 1390, 1309, 1211, 1156, 1116, 1045, 835, 805 cm-1. EI-MS: 145 (M+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
71% | With nitric acid;sulfuric acid; at 15℃; for 1h; | 2-Bromo-4-methyl-5-nitrobenzaldehyde At 5 C., 11 ml of nitric acid (68% strength) were slowly added dropwise to a solution of 11.00 g (55.2 mmol) of <strong>[824-54-4]2-bromo-4-methylbenzaldehyde</strong> in 65 ml of sulfuric acid (95% strength). The reaction temperature was kept below 15 C. The reaction mixture was then stirred at 15 C. for 1 hour and subsequently carefully added to ice-water, filtered off and washed with water. The solid was dried under high vacuum. This gave 13.00 g (purity according to GC-MS 74%, 39.4 mmol, 71% of theory) of 2-bromo-4-methyl-5-nitrobenzaldehyde of log P (HCOOH)=2.61. |
71% | With sulfuric acid; nitric acid; at 5 - 15℃; for 1h; | Preparation of 2-bromo-4-methyl-5-nitrobenzaIdehydeTo a solution of 11.00g (55.2mmol) <strong>[824-54-4]2-bromo-4-methylbenzaldehyde</strong> in 65 ml sulfuric acid (95%) 1 1 mL of nitric acid (68%) is added dropwise at 5C. The reaction temperature is kept below 15C. The reaction mixture is stirred at 15C for Ih and subsequently poured into icewater. After filtration and washing with water the solid residue is dried in vacuo. 13.0O g (74% GC-MS-purity, 39.4 mmol, 71 % of theoretic yield) of 2-bromo-4-methyl-5-nitrobenzaldehyd (logP (HCOOH) = 2.61) are obtained. |
60.9% | With nitric acid; In sulfuric acid; at 5℃; for 0.5h; | In 50 ml double-mouth bottle adding concentrated sulfuric acid (15 ml), in 5 C dropping under 2 - bromo -4 - methyl formaldehyde (3.00 g, 15.1 mmol), then drop of concentrated nitric acid (1.9 ml, 66 mass %), is continuously stirred for 30 minutes. In the into ice water, extracted with ethyl acetate (90 ml × 2), combined with the organic phase, it with water (100 ml × 2) and saturated salt water (100 ml) washing, dried with anhydrous sodium sulfate. Filtering, steams solvent, purification of the residue by silica gel column chromatography (petroleum ether/ethyl acetate (v/v)=50/1), to obtain a pale yellow solid (2.24 g, 60.9%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | To a solution of methyltriphenylphosphonium bromide (20.6 g, 58.0 mmol) in anhydrous tetrahydrofuran (250 ml_) in a dry round-bottomed flask under nitrogen at 0 C was added n-butyllithium (23.0 ml_, 55.0 mmol) . The reaction mixture was stirred at 0 C for 1 hour, and then <strong>[824-54-4]2-bromo-4-methylbenzaldehyde</strong> ( 10.0 g, 50.0 mmol) was added. The reaction mixture was warmed to room temperature over 18 hours. The reaction was quenched with hydrochloric acid (2 N) . The organic layer was separated, dried over sodium sulfate, filtered, and concentrated . The solid was dissolved in dichlorometha ne and recrystallized with diethyl ether. The filtrate was concentrated and then purified twice by flash column chromatography using 0-20% ethyl acetate/hexanes as eluent to provide the title compound as a clear oil ( 11.5 g, 99%) : *H NM R (300 MHz, CDCI3) delta 7.44 (d, J = 7.9 Hz, 1H), 7.38 (dd, J = 1.9, 1.0 Hz, 1H), 7.14 - 6.95 (m, 2H), 5.65 (dd, J = 17.4, 1.1 Hz, 1H), 5.30 (dd, J = 11.0, 1.1 Hz, 1H), 2.31 (s, 3H) ; 13C NMR (126 MHz, CDCI3) delta 139.38, 135.64, 135.62, 135.61, 134.57, 133.28, 128.44, 126.45, 123.49, 115.75, 115.72, 115.69, 115.68, 115.65, 115.64; EI MS m/z 198 ([M]+) . | |
Example 26 Preparation of 2-bromo-4-methyl-1-vinylbenzene (C88) To a solution of methyltriphenylphosphonium bromide (20.6 g, 58.0 mmol) in anhydrous tetrahydrofuran (250 mL) in a dry round-bottomed flask under nitrogen at 0 C. was added n-butyllithium (23.0 mL, 55.0 mmol). The reaction mixture was stirred at 0 C. for 1 hour, and then <strong>[824-54-4]2-bromo-4-methylbenzaldehyde</strong> (10.0 g, 50.0 mmol) was added. The reaction mixture was warmed to room temperature over 18 hours. The reaction was quenched with hydrochloric acid (2 N). The organic layer was separated, dried over sodium sulfate, filtered, and concentrated. The solid was dissolved in dichloromethane and recrystallized with diethyl ether. The filtrate was concentrated and then purified twice by flash column chromatography using 0-20% ethyl acetate/hexanes as eluent to provide the title compound as a clear oil (11.5 g, 99%): 1H NMR (300 MHz, CDCl3) delta 7.44 (d, J=7.9 Hz, 1H), 7.38 (dd, J=1.9, 1.0 Hz, 1H), 7.14-6.95 (m, 2H), 5.65 (dd, J=17.4, 1.1 Hz, 1H), 5.30 (dd, J=11.0, 1.1 Hz, 1H), 2.31 (s, 3H); 13C NMR (126 MHz, CDCl3) delta 139.38, 135.64, 135.62, 135.61, 134.57, 133.28, 128.44, 126.45, 123.49, 115.75, 115.72, 115.69, 115.68, 115.65, 115.64; EIMS m/z 198 ([M]+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With palladium diacetate; sodium carbonate; at 20℃;Inert atmosphere; | General procedure: These compounds were synthesized according to the literature procedure.21 Typical procedure: 2-bromobenzaldehyde (0.92 g,5 mmol), phenylboronic acid (0.67 g, 5.5 mmol), sodium carbonate (0.53 g, 5 mmol), and Pd(OAc)2 (0.028 g, 0.125 mmol) were added to a flask (50 mL) equipped with a high-vacuum PTFE valve-to-glass seal. The flask was opened to the vacuum, pumped for 2-3 min and backfilled with an inert Ar gas. The reaction mixture was stirred at room temperature overnight. Upon completion, the reaction mixture was diluted with CH2Cl2 (3 20 mL) and the organic layer was dried over Na2SO4, concentrated under the reduced pressure to give a dark brown oil, which was further purified via column chromatography on Silica gel (eluent: petroleum ether: EtOAc 20:1) to give 2-phenylbenzaldehyde 1a (0.86 g, 95percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 4 steps 1: Na2CO3 / Pd(OAc)2 / dimethylformamide; H2O / 12 h / 25 °C 2: MgSO4 / toluene / 100 °C 3: cesium pivalate / Pd(OAc)2; 1,1-bis(diphenylphosphino)methane / dimethylformamide / 24 h / 100 °C 4: aq. HCl / acetone |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
86% | With potassium phosphate; palladium diacetate; 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene; In toluene; at 120℃;Schlenk technique; Inert atmosphere; | General procedure: In an oven-dried Schlenk tube were added bromoarylcarbonyl 1/8 (100.0-204.8 mg, 0.54 mmol), phenylacetylene (110.2 mg, 1.08 mmol), Pd(OAc)2 (4.8 mg, 4 mol%), xantphos (25 mg, 8 mol%), and K3PO4 (458 mg, 2.16 mmol) followed by anhyd toluene (1.0 mL) at r.t. under N2 atmosphere and the reaction mixture was allowed to stir at 120 C for 2-6 h. Progress of the alkyne 2 and 9 formation was monitored by TLC until the reaction was complete. Then, the mixture was filtered through Celite and washed with CH2Cl2. Evaporation of the solvent under reduced pressure and purification of the crude material by silica gel column chromatography (PE/EtOAc) furnished the alkyne 2 and 9 (72-91%), respectively, as viscous liquid/semi-solid. |
With bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine; In tetrahydrofuran; at 50℃; for 4h;Inert atmosphere; | General procedure: A two-necked dry flask was charged with the ortho-bromobenzaldehyde (10 mmol), the ethynylbenzene (1.22 g, 12 mmol), and freshly distilled THF 20 mL. Then Et3N (2.8 mL, 20 mmol, 2.0 equiv), PdCl2(PPh3)2 (210 mg, 0.36 mmol, 0.03 equiv), and CuI (95.2 mg, 0.6 mmol, 0.05 equiv) were added. The mixture was heated at 50 C for 4 h. After the reaction was complete (monitored by TLC), the solvents were evaporated under reduced pressure. The crude product was purified by column chromatography (SiO2, ethyl acetate/petroleum ether = 100: 1) to afford the ortho-alkynylbenzaldehyde. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Referential Example 25 5-(2-Bromo-4-methylphenyl)-1,3-oxazole (50) 1-Hydroxybenzotriazole (3.78 g), 4-dimethylaminopyridine (3.42 g), and N-ethyl-N'-(3-dimethylaminopropyl)carbodiimide hydrochloride (5.40 g) were added to a solution (100 mL) of 2-bromo-4-methylbenzoic acid (5.00 g)and N,O-dimethylhydroxylamine hydrochloride (2.73 g) in dichloromethane, followed by stirring at room temperature for 13 hours. 1N Hydrochloric acid was added to the reaction mixture, followed by extraction with dichloromethane and evaporation of the solvent. After purification, 2-bromo-4,N-dimethyl-N-methoxybenzamide (6.0 g) was yielded. The 2-bromo-4,N-dimethyl-N-methoxybenzamide (6.0 g) was dissolved in an anhydrous tetrahydrofuran solution (50 mL) under a stream of argon. Diisobutylaluminum hydride (24.7 mL, 0.93M hexane solution) was added dropwise to the solution at -78C, and the mixture was stirred at the same temperature for 2 hours. Methanol (5 mL) was added dropwise to the reaction mixture, and an aqueous saturated ammonium chloride solution (5 mL) was added thereto, the mixture was stirred at room temperature for 1 hour. Sodium sulfate anhydrate was added to the reaction mixture, followed by further stirring for 1 hour. The precipitated matter was removed through filtration by use of Celite, and the filtrate was purified, to thereby yield 2-bromo-4-methylbenzaldehyde (4.0 g). The procedure of Referential Example 9 was repeated, except that 2-bromo-4-methylbenzaldehyde (4.0 g) was used, to thereby yield the title compound (3.7 g). 1H-NMR(400MHz,CDCl3)delta:2.37(3H,s),7.20(1H,d,J=8.1Hz), 7.51(1H,s),7.63(1H,d,J=8.1Hz),7.78(1H,s),7.94(1H,s). EI-MS m/z:238(M)+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
79% | With sodium acetate; palladium diacetate; triphenylphosphine In N,N-dimethyl-formamide at 120℃; for 15h; Inert atmosphere; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
73% | General procedure: To a solution of o-halobenzaldehyde (0.25 mmol) in DMF (1 mL), tert-butyl amine (0.75 mmol) was added. The resulting mixture was stirred under a nitrogen atmosphere at room temperature for 12 h (or 100 °C for 4 h). After the haloaldehyde was consumed completely (monitored by TLC), alkynes (0.50 mmol), Na2CO3 (0.50 mmol), LiCl (0.25 mmol), palladacycle (1 mol percent), and DMF (1 mL) were added to the mixture. Then the vial was placed in a preheated oil bath and heated at 100 °C under stirring for 24 h. After the reaction was complete (monitored by TLC), the mixture was diluted with CH2Cl2 (10 mL), filtered through a pad of Celite, and extracted with CH2Cl2. The combined organic phase was dried over anhydrous Na2SO4, filtered, and evaporated under reduced pressure. The residue was purified by flash chromatography on silica gel (ethyl acetate/hexane) to afford the pure product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
67% | General procedure: To a solution of o-halobenzaldehyde (0.25 mmol) in DMF (1 mL), tert-butyl amine (0.75 mmol) was added. The resulting mixture was stirred under a nitrogen atmosphere at room temperature for 12 h (or 100 °C for 4 h). After the haloaldehyde was consumed completely (monitored by TLC), alkynes (0.50 mmol), Na2CO3 (0.50 mmol), LiCl (0.25 mmol), palladacycle (1 mol percent), and DMF (1 mL) were added to the mixture. Then the vial was placed in a preheated oil bath and heated at 100 °C under stirring for 24 h. After the reaction was complete (monitored by TLC), the mixture was diluted with CH2Cl2 (10 mL), filtered through a pad of Celite, and extracted with CH2Cl2. The combined organic phase was dried over anhydrous Na2SO4, filtered, and evaporated under reduced pressure. The residue was purified by flash chromatography on silica gel (ethyl acetate/hexane) to afford the pure product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
78% | With potassium phosphate; palladium diacetate; In N,N-dimethyl-formamide; at 85℃; for 12h;Inert atmosphere; | General procedure: A two-neck round bottom is charged with Pd(OAc)2 (242.6mg, 1.1mmol) and K3PO4 (3.32g, 15.6mmol) under nitrogen atmosphere. To this mixture was added N,N-dimethylformamide (20mL), substituted 2-bromobenzaldehyde (10.8mmol) and substituted styrene (21.6mmol). After stirring at 85°C for 12h, the mixture was cooled to room temperature and poured into ice water (40mL). The mixture was filtered through a celite pad and extracted with EtOAc (40mL×3). The combined organic layers were washed with brine, dried over Na2SO4 and concentrated. The residue was purified on a silica gel column with petroleum ether (abbreviate to PE) as eluent to afford the desired product with (E)-configuration in 36?90percent yield. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With toluene-4-sulfonic acid; In toluene; for 7h;Reflux; | General procedure A: Synthesis of acetal protected aldehydes 1,3-Propanediol (1.5 eq.) and p-TSA (0.1 eq.) were added to a solution of aldehyde (5.0 mmol, 1.0 eq.) in toluene. The reaction was heated to reflux and left to stir for 7 hours. After cooling to room temperature, the reaction was washed with three portions of H2O, dried over MgSO4 and the solvent removed under reduced pressure to afford the crude acetal protected product. General procedure A was followed using <strong>[824-54-4]2-bromo-4-methylbenzaldehyde</strong> (995 mg, 5.00 mmol), followed by purification by column chromatography (eluent: DCM), to provide the title compound as a pale yellow oil in 85percent yield (1.09 g, 4.25 mmol). Rf (DCM) = 0.50; 1H NMR (300 MHz, CDCl3) deltaH: 7.55 (1H, d, J = 8.0 Hz, ArH), 7.35 (1H, s, ArH), 7.13 (1H, d, J = 7.7 Hz, ArH), 5.72 (1H, s, CH), 4.27 (1H, dd, J = 5.1, 1.3 Hz, OCHAHB), 4.23 (1H, dd, J = 5.1, 1.3 Hz, OCHAHB), 4.03 (2H, td, J = 12.2, 2.4 Hz, OCH2), 2.30 (3H, s, CH3), 2.28-2.15 (1H, m, CH2CHAHBCH2), 1.47-1.40 (1H, m, CH2CHAHBCH2); 13C{1H} NMR (75.5 MHz CDCl3) deltaC: S7 140.7, 134.7, 133.1, 128.5, 127.8, 122.1, 101.0, 67.7, 25.8, 21.0; I.R (thinfilm) nu max (cm-1): 1610 (ArC=C), 1566 (ArC=C); HRMS (ESI): m/z calculated for C11H13BrO2: requires: 278.9996 for [M+Na]+; found: 279.0002 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: sodium tetrahydroborate / methanol / 0.33 h / 0 °C 2: phosphorus tribromide / diethyl ether / 3 h / 0 °C | ||
Stage #1: 2-bromo-4-methylbenzaldehyde With sodium tetrahydroborate Inert atmosphere; Stage #2: Inert atmosphere; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
45% | nickel dibromide; In 1-methyl-pyrrolidin-2-one; at 170℃; under 12751.3 Torr; for 0.075h;Microwave irradiation; | 2-Formyl-5-methyl-benzonitrile (III-G).2-Bromo-4-methylbenzaldehyde VII-G (2.5 g, 12.3 mmol), CuCN (5.52 g, 61.6 mmol) and NiBr2 (807.0 mg, 3.69 mmol) were dissolved in 50 mL NMP.The reaction mixture was irradiated in a microwave oven for 4.5 min (T=170° C., pmax=17 bar, 200 W, powermax on).Next, the reaction mixture was poured into H2O (600 mL) and extracted with CH2Cl2 (3*600 mL).The combined organic phases were dried on MgSO4, evaporated in vacuo and purified by flash chromatography over silicagel (Hexane/EtOAc, 70/30) resulting in pure III-G, 790.6 mg (45percent).1H-NMR (300 MHz, CDCl3): delta 2.48 (s, 3H), 7.56 (d, J=8.0 Hz, 1H), 7.62 (s, 1H), 7.93 (d, J=8.0 Hz, 1H), 10.28 (s, 1H) ppm. 13C-NMR (75.4 MHz, CDCl3): delta 21.5 (CH3), 113.9 (C), 116.1 (C), 129.6 (CH), 133.9 (CH), 134.4 (CH), 134.6 (C), 145.8 (C), 188.3 (CH) ppm. IR (HATR): 3194, 2222, 1697, 1597, 1573, 1452, 1390, 1309, 1211, 1156, 1116, 1045, 835, 805 cm-1. EI-MS: 145 (M+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With tetrakis(triphenylphosphine) palladium(0); potassium acetate; In N,N-dimethyl acetamide; at 150℃; for 1.5h;Microwave irradiation; | In a 100 mL round-bottom flask were placed 2-methyl-4-(phenylsulfonylmethyl) thiazole or 2-methyl-4-(tosylmethyl)thiazole or 4-[(4-chlorophenylsulfonyl)methyl]-2-methylthiazole (1.5 equiv), 2-bromobenzaldehyde or 2-bromobenzonitrile (1 equiv), tetrakis(triphenylphosphine) palladium (0.05 equiv), potassium acetate(3 equiv) and dimethylacetamide (5 mL). The vessel was then placed in the synthesis multimode microwave oven cavity (ETHOS Synth Lab station) and reaction was carried out under microwave irradiation at 150 C at 300 W for an appropriate time. The disappearance of starting materials was monitored by TLC. After being cooled down, the mixture was poured into water and then extracted with EtOAc (5 * 15 mL). The organic layers were dried over anhydrous sodium sulfate and removed under vacuum. The residue was purified by chromatographic column, eluting with EtOAc/cyclohexane (5/5) for all compounds except 7 (chloroform/petroleum ether/ethyl ether (6/2/2)) and 8 (chloroform/EtOAc (9/1)). The residue was then recrystallized from i-PrOH to give the corresponding required product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
87% | With tetrakis(triphenylphosphine) palladium(0); potassium acetate; In N,N-dimethyl acetamide; at 150℃; for 2h;Microwave irradiation; | In a 100 mL round-bottom flask were placed 2-methyl-4-(phenylsulfonylmethyl) thiazole or 2-methyl-4-(tosylmethyl)thiazole or 4-[(4-chlorophenylsulfonyl)methyl]-2-methylthiazole (1.5 equiv), 2-bromobenzaldehyde or 2-bromobenzonitrile (1 equiv), tetrakis(triphenylphosphine) palladium (0.05 equiv), potassium acetate(3 equiv) and dimethylacetamide (5 mL). The vessel was then placed in the synthesis multimode microwave oven cavity (ETHOS Synth Lab station) and reaction was carried out under microwave irradiation at 150 C at 300 W for an appropriate time. The disappearance of starting materials was monitored by TLC. After being cooled down, the mixture was poured into water and then extracted with EtOAc (5 * 15 mL). The organic layers were dried over anhydrous sodium sulfate and removed under vacuum. The residue was purified by chromatographic column, eluting with EtOAc/cyclohexane (5/5) for all compounds except 7 (chloroform/petroleum ether/ethyl ether (6/2/2)) and 8 (chloroform/EtOAc (9/1)). The residue was then recrystallized from i-PrOH to give the corresponding required product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | With palladium diacetate; potassium carbonate; triphenylphosphine; In N,N-dimethyl-formamide; at 90℃; for 4h;Inert atmosphere; | General procedure: The 2-bromoarylcarboxaldehyde (1 mmol), 2-hydroxyphenylboronic acid (1 mmol), K2CO3 (1 mmol.), PPh3 (0.25 mmol) were taken in a two-necked round bottomed flask and flushed with nitrogen gas. Then 3 mL of DMF was added and degassed with N2. The catalyst Pd(OAc)2 (5 molpercent) was added to the reaction mixture and heated at 90 ?C for 4 h. After completion of the reaction, the reaction mixture was allowed to cool to room temperature, diluted with water and extracted with ethyl acetate (3 × 20 mL). The combined organic layer was dried over Na2SO4 and evaporated under reduced pressure. The crude product was purified by column chromatography using silica gel (60-120 mesh) and hexane/EtOAc as eluent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
78% | With sodium acetate; palladium diacetate; triphenylphosphine; In N,N-dimethyl-formamide; at 80℃; for 3h; | General procedure: 1a-1g (1mmol) and 2 (1.2 mmol) were heated at 80oC in presence of Pd(OAc)2 (10 molpercent) , NaOAc (1.5 mmol) and PPh3 (0.25 mmol) in dry DMF (6 mL) for 3h. Then it was allowed to cool to r.t and extracted with EtOAc (3 x 20 mL).Then organic layer was washed with water and dried over Na2SO4 and concentrated in vacuum to get crude product which was then purified through column chromatography by using silica gel ( 60-120 mesh) and pet erther : EtOAc (20:1) as eluent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
66% | With palladium diacetate; caesium carbonate; catacxium A; In 1,4-dioxane; at 140℃; for 1h;Microwave irradiation; Inert atmosphere; | General procedure: To a solution of 2-bromobenzaldehyde (1) (1.00 mmol) and phenylhydrazine (2) (1.00 mmol)in anhydrous 1,4-dioxane (2 mL) was added cesium carbonate (3.00 mmol) in a 2-5 mLcapacity microwave vial. The mixture was stirred and degassed with argon gas for 5 min. Tothis mixture were added Pd(OAc)2 (0.10 mmol) and di-1-adamantyl-n-butylphosphine (0.20mmol) under argon atmosphere, and purged with argon gas for 2 min and then molybdenumhexacarbonyl (2.50 mmol) was added and the vial was sealed and irradiated in microwave at140 °C for 1 h. The vial was cooled to room temperature over a period of 10 min and filteredthrough Celite pad, washed with ethyl acetate (10 mL). The combined filtrate was concentrated in vacuo and the obtained residue was purified by flash column chromatography over 4 g SNAP cartridge by eluting with gradient of 20-40percent ethyl acetate in hexane to afford2-phenylphthalazin-1(2H)-one (3) (60percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With palladium diacetate; caesium carbonate; catacxium A; In 1,4-dioxane; at 140℃; for 1h;Microwave irradiation; Inert atmosphere; | General procedure: To a solution of 2-bromobenzaldehyde (1) (1.00 mmol) and phenylhydrazine (2) (1.00 mmol)in anhydrous 1,4-dioxane (2 mL) was added cesium carbonate (3.00 mmol) in a 2-5 mLcapacity microwave vial. The mixture was stirred and degassed with argon gas for 5 min. Tothis mixture were added Pd(OAc)2 (0.10 mmol) and di-1-adamantyl-n-butylphosphine (0.20mmol) under argon atmosphere, and purged with argon gas for 2 min and then molybdenumhexacarbonyl (2.50 mmol) was added and the vial was sealed and irradiated in microwave at140 °C for 1 h. The vial was cooled to room temperature over a period of 10 min and filteredthrough Celite pad, washed with ethyl acetate (10 mL). The combined filtrate was concentrated in vacuo and the obtained residue was purified by flash column chromatography over 4 g SNAP cartridge by eluting with gradient of 20-40percent ethyl acetate in hexane to afford2-phenylphthalazin-1(2H)-one (3) (60percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
58% | With ammonium hydroxide; copper(l) iodide; 1,10-Phenanthroline; triethylamine; In N,N-dimethyl-formamide; at 95℃; for 5h;Inert atmosphere; | General procedure: In a two necked round bottom flask a mixture of ortho-bromoaldehyde (100 mg, 0.54 mmol), phenylacetylene (66.10 mg, 0.648 mmol), aq. NH3 (2.5 M in DMF), Et3N (2 mmol), CuI (10 mol percent), 9,10-Phenanthroline (0.25 mmol ) were taken in 3mL of DMF solvent in inert atmosphere. This mixture were heated to 95 oC temperature for 5 h. Completion of the reaction was confirmed by monitoring TLC. After the completion of the reaction themixture were cooled to room temperature and diluted with water and extracted with EtOAc (3×50 mL). Combined organic organic layer was washed with brine and dried over anhydrous Na2SO4. It was then evaporated under reduced pressure and desired product was isolated by column chromatography using silica gel mess and mixture of EtOAc and petroleum ether as eluents. Yellow Solid; mp: 148-150 oC;Yields: 58percent; 1H NMR (CDCl3, 200 MHz): 2.55 (3H , s),7.38-7.55 (4H, m), 7.63 (1H, s), 7.87 (1H, d, J = 8.4 Hz), 7.97 (1H, s), 8.12 (2H, d, J = 7.2 Hz), 9.27 (1H, s); 13C NMR (CDCl3, 50MHz): 22.3, 116.3, 126.0, 126.5, 127.2 (2C), 127.5, 128.6, 129.0 (2C), 129.6,137.2, 139.9, 141.1, 151.5, 152.2; Elemental Analysis: C: 87.64; H: 5.98; N:6.39percent; Found : C: 87.60; H: 5.92; N: 6.30 percent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92% | With ammonium hydroxide; 1,10-Phenanthroline; caesium carbonate; In N,N-dimethyl-formamide; at 80℃; for 20h;Sealed tube; | Typical procedure for the preparation of 4a: To a solution of 2-bromobenzaldehyde (1a, 0.5 mmol)and acetophenone (2a, 0.6 mmol) in DMF (3 mL) were added Cs2CO3 (1 mmol), CuI (0.05 mmol),1,10-phen (0.1 mmol) and 26percent aqueous ammonia (3, 0.5 mL). Then the tube was sealed and the mixturewas stirred at 80 C under air atmosphere for 20 h. After being cooled to room temperature, it wasquenched with aqueous NH4Cl solution and extracted with ethyl acetate. The combined organic layerswere washed with H2O and brine, and then dried over anhydrous Na2SO4. The solvent was evaporatedunder vacuum and the crude product was purified by column chromatography eluting with petroleumether/ethyl acetate (50:1) to give 2-phenylquinoline (4a). Quinolines 4b-4q were obtained in a similar manner. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With copper(l) iodide; potassium carbonate; ethylenediamine; In N,N-dimethyl-formamide; at 110℃; for 3h; | General procedure: To a solution of 2-bromobenzaldehyde (1a, 1 mmol) and 1H-pyrazol-5-amine (2a, 1.2 mmol) in DMF (5 mL) were added K2CO3 (2 mmol), CuI (0.2 mmol) and ethylenediamine(0.2 mmol). The mixture was stirred at 110 °C until a complete conversion as indicated by TLC. It was cooled to room temperature and added with saturated brine, then extracted with ethyl acetate. The combined organic phase was concentrated under vacuum. The crude product was purified by columnchromatography eluting with petroleum ether/ethyl acetate (10:1) to give the desired product 3a. Products 3b?3ll were obtained in a similar manner. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
41% | With copper(l) iodide; potassium carbonate; ethylenediamine; In N,N-dimethyl-formamide; at 110℃; for 10h; | General procedure: To a solution of 2-bromobenzaldehyde (1a, 1 mmol) and 1H-pyrazol-5-amine (2a, 1.2 mmol) in DMF (5 mL) were added K2CO3 (2 mmol), CuI (0.2 mmol) and ethylenediamine(0.2 mmol). The mixture was stirred at 110 °C until a complete conversion as indicated by TLC. It was cooled to room temperature and added with saturated brine, then extracted with ethyl acetate. The combined organic phase was concentrated under vacuum. The crude product was purified by columnchromatography eluting with petroleum ether/ethyl acetate (10:1) to give the desired product 3a. Products 3b?3ll were obtained in a similar manner. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With copper(l) iodide; potassium carbonate; ethylenediamine; In N,N-dimethyl-formamide; at 110℃; for 3h; | General procedure: To a solution of 2-bromobenzaldehyde (1a, 1 mmol) and 1H-pyrazol-5-amine (2a, 1.2 mmol) in DMF (5 mL) were added K2CO3 (2 mmol), CuI (0.2 mmol) and ethylenediamine(0.2 mmol). The mixture was stirred at 110 °C until a complete conversion as indicated by TLC. It was cooled to room temperature and added with saturated brine, then extracted with ethyl acetate. The combined organic phase was concentrated under vacuum. The crude product was purified by columnchromatography eluting with petroleum ether/ethyl acetate (10:1) to give the desired product 3a. Products 3b?3ll were obtained in a similar manner. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | With triphenylmethyl alcohol; iron(III) chloride hexahydrate; at 55℃; for 1h;Microwave irradiation; | General procedure: The benzyl alcohols substrates (1a?1p) (0.2mmol), FeCl3·6H2O (0.002mmol, 5.4mg) and triphenylmethanol 2 (0.2mmol, 52mg) were mixed in a dried vessel. Then the reaction was irradiated under the microwave at 55°C for 1h. The crude mixture was purified by a flash column chromatography to afford the benzaldehydes (4a?4p). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: tetrahydrofuran / 2 h / -78 - 0 °C / Inert atmosphere 2: manganese(IV) oxide / dichloromethane / 12 h / Reflux | ||
Multi-step reaction with 2 steps 1: diethyl ether; dibutyl ether / -78 - 0 °C / Inert atmosphere 2: manganese(IV) oxide / chloroform / 18 h / Reflux; Inert atmosphere | ||
Multi-step reaction with 2 steps 1: tetrahydrofuran; diethyl ether / 3 h / 0 °C / Inert atmosphere 2: pyridinium chlorochromate / dichloromethane / 2 h / 20 °C |
Multi-step reaction with 2 steps 1: tetrahydrofuran / 0 °C / Inert atmosphere 2: pyridinium chlorochromate; silica gel / dichloromethane / 20 °C | ||
Multi-step reaction with 2 steps 1: tetrahydrofuran / 0 - 20 °C 2: pyridinium chlorochromate / dichloromethane / 0 - 20 °C / Molecular sieve | ||
Multi-step reaction with 2 steps 1: tetrahydrofuran / 0 °C / Schlenk technique; Inert atmosphere 2: pyridinium chlorochromate / dichloromethane / 20 °C | ||
Multi-step reaction with 2 steps 1: magnesium; iodine / diethyl ether / 3 h / -10 - 0 °C 2: pyridinium chlorochromate; silica gel / dichloromethane / 2 h / 20 °C | ||
Multi-step reaction with 2 steps 1: tetrahydrofuran / 3 h / -78 - 20 °C / Schlenk technique 2: pyridinium chlorochromate / dichloromethane / 3 h / 20 °C / Schlenk technique | ||
Multi-step reaction with 2 steps 1.1: magnesium; iodine / diethyl ether 1.2: 3 h / -10 - 0 °C 2.1: pyridinium chlorochromate; silica gel / dichloromethane / 2 h / 20 °C | ||
Multi-step reaction with 2 steps 1: magnesium; iodine / diethyl ether / 4 h / 0 °C 2: pyridinium chlorochromate / dichloromethane / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
34.6% | With sodium ethanolate; sodium; In ethanol; at -10℃; for 3h; | Finely sliced sodium (2.90 g, 125 mmol, 5 eq.) was stirred in ethanol (50 mL) until the sodium was completely consumed. To the mixture of freshly prepared sodium ethoxide was added a mixture of compound 1 (5.00 g, 25.1 mmol) and ethyl azidoacetate (16.2 g, 125 mmol, 5 eq.) in ethanol (50 mL) dropwise over 1.5 h. The inner temperature was kept at ?10° C. (Caution: The reaction proceeds vigorously without careful cooling.) After addition, the mixture was stirred at ?10° C. for an additional 1.5 h, poured into ice-water, and extracted with petroleum ether (3×200 mL). The combined extracts were washed with brine, dried over Na2SO4, and concentrated to give the crude product (2.70 g, 8.70 mmol, 34.6percent) as a yellow solid. TLC showed a less polar spot than the starting material (TLC, petroleum ether, Rf=0.8). The crude product was used directly for the next step without further purification |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With potassium fluoride; In ethanol; at 60℃; for 6h;Green chemistry; | General procedure: The reaction was performed in a 20 mL V-type tube equipment with a triangle magnetic stirring bar. In a typical reaction, 4-hydroxyindole (0.4 mmol) was mixed with malonodinitrile (0.4 mmol) and aldehydes (0.4 mmol) in 2.0 mL of ethanol. KF (0.08 mmol) was then added. The mixture was subsequently heated to 60 °C under stirring for 6 h. After the reaction, the mixture was cooled to room temperature, and the target product was isolated using a preparative thin-layer chromatograph (TLC) with eluting solution [petroleum ether/ethyl acetate 3/1 (v/v)]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
96% | With potassium carbonate; 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene; bis(dibenzylideneacetone)-palladium(0); In 1,4-dioxane; at 30℃; for 0.8h; | Under the protection of nitrogen, (S) - 2 - (4-isopropyl -4,5- [...] -2-yl) aniline (2.2473g, 11mmol, 1.1equiv) with 2-bromo-4-methyl-phenyl-formaldehyde (2.0300g, 10mmol, 1.0equiv) in 20 ml of dioxane and, Pd (dba)2(0.2875g, 0 . 5mmol, 5mol percent), Xantphos (0.3472g, 0 . 6mmol, 6mol percent), potassium carbonate (2.7642g, 20mmol, 2.0equiv), 30 °C reaction 48 hours, petroleum ether: ethyl acetate = 20:1 column, get 3.0950g (9.6mmol, 96percent) containing oxazoline amine compound A7. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | With vasicine; In ethanol; at 20℃; for 24h; | General procedure: To the solution of vasicine (0.05 mmol) in ethanol (2 mL) were added aldehyde (0.5 mmol) and nitromethane (5 mmol) and allowed to stir at room temperature. The progress of reaction was monitored by TLC. After completion of reaction, the solvent was evaporated under reduced pressure and product was purified by column chromatography using n-hexane:ethyl acetate. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With air; In ethyl acetate; at 20℃;Irradiation; | General procedure: To a 20 mL glass tube with a stir bar was charged 2-aminothiophenol 1a (50 mg, 0.4 mmol), benzaldehyde 2a (51 mg, 0.48 mmol) and EtOAc (2 mL). The solution was stirred at room temperature with the irradiation of a 12 W blue LED for 6 h. The solvent was removed under vacuum. The residue was purified by column chromatography over silica gel (petroleum ether/ethyl acetate = 40/1) to give the product 3a (77 mg, 91percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With tin(II) chloride dihdyrate; In tetrahydrofuran; at 80℃; for 4h; | General procedure: Aromatic aldehyde 1 (1 mmol), 6-nitro-1H-indazole 2 or 5-nitrobenzimidazole 7 (1 mmol), 2,2-dimethyl-1,3-dioxane-4,6-dione 3 or 1,3-cyclohexanedione or dimedone 5 (1 mmol), SnCl2·2H2O (3 mmol), and THF (6 mL) were put into a 25-mL round-bottom flask. Then, the mixture was stirred at 80 oC about 3-8 h (monitored reactions by TLC). After completion the reaction, the solution was allowed to cool and the pH was made slightly basic (pH 8) by addition of 5percent aqueous NaHCO3. The mixture was transferred to a separatory funnel, and was extracted with 3x15 mL of ethyl acetate. Organics were combined and washed thoroughly with saturated NaCl (aq), dried over anhydrous Na2SO4, and filtered through Celite. Following reduction of the solvent in vacuo, the material remaining was purified by crystallization from DMF or EtOH, to give the pure products 4, 6 and 8. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With hydroxylamine hydrochloride; sodium acetate; In methanol; water; at 20℃; for 4h; | General procedure: S1 (3.0 mmol), hydroxylamine hydrochloride (4.2 mmol), sodium acetate (6.0 mmol), water (3.0 ml) and methanol (10.2 ml) were charged in 25 ml round-bottom flask, and stirred for 4h at room temperature. After the completion of the reaction (monitored by TLC), the reaction was then diluted with water and extracted three times with methylene chloride. The combined organic extracts were dried over Na2SO4, and the solvent was evaporated to give S2 (in 80?92percent yield), which were used directly in the next step. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
63% | With 4-aminobenzene-1,3-disulfonic acid; palladium diacetate; 1-fluoro-2,4,6-trimethylpyridinium trifluoromethanesulfonate at 110℃; for 24h; Sealed tube; regioselective reaction; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | With 1,4-diaza-bicyclo[2.2.2]octane; In water; for 0.5h;Reflux; | General procedure: A mixture of substituted benzaldehyde (1 mmol),5,5-dimethylcyclohexane-1,3-dione (2 mmol) and DABCO(10 mmol percent) in H2O (20 mL) was refluxed for 30 min. Theprogress of the reaction was monitored by TLC by using silicagel 60G F254 plates and dichlormethane : hexane = 1 : 1as the mobile phase. After completion of the reaction, themixture was cooled to room temperature, and the solid wasfiltered off and washed with distilled water. The crudeproduct was purified by recrystallization from 96 percentethanol.[19] |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
73% | With tris-(dibenzylideneacetone)dipalladium(0); caesium carbonate; 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl; In toluene; at 90℃; for 48h; | a solution of <strong>[824-54-4]2-bromo-4-methylbenzaldehyde</strong> (3.00 g, 15.07 mmol), pyrrolidine (1.87 mL, 22.61 mmol), BINAP (436 mg, 0.75 mmol), Pd2(dba)3 (276 mg, 0.30 mmol) and Cs2003 (6.88 g, 21.10 mmol) in dry toluene (60 mL)was heated at 90°C for two days. Water was added to quench the reaction. The two layers were partitionated and the organic layer was dried over Mg504, filtered and the solution was concentrated under reduced pressure. The crude material was purified by silica gel column chromatography using Hexanes/EtOAc as eluent (15:1) to afford 4-methyl-2-(pyrrolidin-1-yl)benzaldehyde Ex.44a (2.08 g, 73percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
167 mg | With dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; palladium diacetate; caesium carbonate; In 1,4-dioxane; at 100℃; for 3h;Inert atmosphere; | A suspension of the Compound 2 (300 mg), the Compound 3 (338 mg), phosphine ligand 4 (123 mg), palladium acetate (31 mg), and cesium carbonate (1.39 g) in 1,4- dioxane (9 mE) was stirred at 1000 C. under a nitrogen atmosphere for 3 hours. The reaction mixture was allowed to cool to room temperature, and then the resulting insoluble matters were removed by filtration, and the resulting filtrate was concentrated under reduced pressure. The resulting residues were purified by silica gel column chromatography (hexane:ethyl acetate=95:5 to 80:20) to give the Compound 5 (167 mg) as a yellow powdet MS (APCI): mlz 294 [M+H] |
167 mg | With dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; palladium diacetate; caesium carbonate; In 1,4-dioxane; at 100℃; for 3h;Inert atmosphere; | (2) Compound 2 (300 mg),Compound 3 (338 mg), phosphine ligand 4 (123 mg),Palladium acetate (31 mg) and cesium carbonate (1.39 g)Of 1,4-dioxane (9 mL)The suspension was stirred under nitrogen atmosphere at 100 C. for 3 hours.The reaction mixture was allowed to cool to room temperature, and insoluble matter was removed by filtration, and the filtrate was concentrated under reduced pressure.The residue was purified by silica gel column chromatography (hexane: acetic acidEthyl = 95: 5 to 80: 20) to give Compound 5 (167 mg) as a yellow powder. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In dimethyl sulfoxide; at 70℃; for 10h;Inert atmosphere; Schlenk technique; | General procedure: To a schlenk tube (15 mL) containing a solution of <strong>[32566-01-1]2-(1H-indol-2-yl)aniline</strong> 3a (0.4 mmol) in DMSO (2 mL) was added 2-bromobenzaldehyde 4 (0.44 mmol) under nitrogen atmosphere.Then, the reaction mixture was stirred at 70C for 10 h until <strong>[32566-01-1]2-(1H-indol-2-yl)aniline</strong> 3a was consumed completely. Next, Pd(PPh3)2Cl2(0.02 mmol), [(t-Bu)3PH]BF4 (0.06 mmol) and Et3N (1.2 mmol) wereadded into the above reaction system under CO (1 atm) atmo-sphere. After being stirred at 120C for 5 h, the resulting mixturewas quenched with NH4Cl and extracted with ethyl acetate. Thecombined organic layer was washed with H2O and brine, and thendried over anhydrous Na2SO4. The solvent was removed underreduced pressure and the residue was puried by column chro-matography on silica gel (petroleum ether/ethyl acetate 5:1) toafford the corresponding indolo[1,2-c]isoindolo[2,1-a]quinazolin-5(16aH)-one 2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
70% | A 25-mL round-bottom flask was charged with <strong>[824-54-4]2-bromo-4-methylbenzaldehyde</strong> (300 mg, 1.51 mmol, 1.00 equiv), tert-butyl piperazine-1-carboxylate (336 mg, 1.80 mmol, 1.20 equiv), 1,2-dichloroethane (5 mL), and triethylamine (457 mg, 4.52 mmol, 3.00 equiv). The mixture was allowed to stir at room temperature for 30 min prior to addition of sodium triacetoxyborohydride (959 mg, 4.52 mmol, 3.00 equiv). The resulting solution was allowed to stir overnight at room temperature and quenched with water (20 mL). The mixture was extracted with dichloromethane (3*30 mL) and the organic layers were combined, washed with water (3*10 mL), dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The residue was chromatographed on a silica gel column with dichloromethane/methanol (98/2) to provide 390 mg (70% yield) of tert-butyl 4-(2-bromo-4-methylbenzyl)piperazine-1-carboxylate as a colorless oil. LCMS (ESI, m/z): 369 [M+H]+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77% | With 1,4-diaza-bicyclo[2.2.2]octane; C31H52CuN2O4; In propan-1-ol; tert-butyl methyl ether; at 10℃; | General procedure: A solution of anhydrous Cu(OAc)2 (1.8 mg, 0.01 mmol) andligand 7d (4.0 mg, 0.01 mmol) in MTBE (1 mL) in a 10mL test tubeequipped with a magnetic stirring bar was stirred at room temperaturefor 30 min. Next, 20 mL DABCO (5M dissolved in n-propanol)was added, followed by stirring for 5 min. After the aldehyde(0.2 mmol) was added to the reaction mixture, we stirred the mixture at 10 C for 2 min, and then 2-nitropropane (180 mL,2 mmol) was added to the tube. The reaction was stirred at 10 Cand monitored by TLC. After the complete reaction, the chiral product was separated by flash column chromatography (PE/EA 9/1). Enantiomeric excesses were determined by HPLC chiralcolumn. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: palladium diacetate; dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; potassium phosphate / tetrahydrofuran; water / 12 h / 90 °C / Inert atmosphere; Schlenk technique 2: cobalt(II) iodide; 1,3-bis-(diphenylphosphino)propane; zinc / N,N-dimethyl-formamide / 12 h / 80 °C / Inert atmosphere; Glovebox |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
95% | With dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; potassium phosphate; palladium diacetate In tetrahydrofuran; water at 90℃; for 12h; Inert atmosphere; Schlenk technique; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: sodium tetrahydridoborate; methanol / 16 h / 20 °C 2: thionyl chloride / dichloromethane / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: sodium carbonate; palladium diacetate / N,N-dimethyl-formamide; water / 12 h / 25 °C / Inert atmosphere; Sealed tube 2: chloropyridinecobaloxime(III); pyridine / dichloromethane / 24 h / 20 °C / Inert atmosphere; Irradiation |
Tags: 824-54-4 synthesis path| 824-54-4 SDS| 824-54-4 COA| 824-54-4 purity| 824-54-4 application| 824-54-4 NMR| 824-54-4 COA| 824-54-4 structure
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P307 + P311 | IF exposed: call a POISON CENTER or doctor/physician. |
P308 + P313 | IF exposed or concerned: Get medical advice/attention. |
P309 + P311 | IF exposed or if you feel unwell: call a POISON CENTER or doctor/physician. |
P332 + P313 | IF SKIN irritation occurs: Get medical advice/attention. |
P333 + P313 | IF SKIN irritation or rash occurs: Get medical advice/attention. |
P335 + P334 | Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages. |
P337 + P313 | IF eye irritation persists: Get medical advice/attention. |
P342 + P311 | IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician. |
P370 + P376 | In case of fire: Stop leak if safe to Do so. |
P370 + P378 | In case of fire: |
P370 + P380 | In case of fire: Evacuate area. |
P370 + P380 + P375 | In case of fire: Evacuate area. Fight fire remotely due to the risk of explosion. |
P371 + P380 + P375 | In case of major fire and large quantities: Evacuate area. Fight fire remotely due to the risk of explosion. |
Storage | |
Code | Phrase |
P401 | |
P402 | Store in a dry place. |
P403 | Store in a well-ventilated place. |
P404 | Store in a closed container. |
P405 | Store locked up. |
P406 | Store in corrosive resistant/ container with a resistant inner liner. |
P407 | Maintain air gap between stacks/pallets. |
P410 | Protect from sunlight. |
P411 | |
P412 | Do not expose to temperatures exceeding 50 oC/ 122 oF. |
P413 | |
P420 | Store away from other materials. |
P422 | |
P402 + P404 | Store in a dry place. Store in a closed container. |
P403 + P233 | Store in a well-ventilated place. Keep container tightly closed. |
P403 + P235 | Store in a well-ventilated place. Keep cool. |
P410 + P403 | Protect from sunlight. Store in a well-ventilated place. |
P410 + P412 | Protect from sunlight. Do not expose to temperatures exceeding 50 oC/122oF. |
P411 + P235 | Keep cool. |
Disposal | |
Code | Phrase |
P501 | Dispose of contents/container to ... |
P502 | Refer to manufacturer/supplier for information on recovery/recycling |
Physical hazards | |
Code | Phrase |
H200 | Unstable explosive |
H201 | Explosive; mass explosion hazard |
H202 | Explosive; severe projection hazard |
H203 | Explosive; fire, blast or projection hazard |
H204 | Fire or projection hazard |
H205 | May mass explode in fire |
H220 | Extremely flammable gas |
H221 | Flammable gas |
H222 | Extremely flammable aerosol |
H223 | Flammable aerosol |
H224 | Extremely flammable liquid and vapour |
H225 | Highly flammable liquid and vapour |
H226 | Flammable liquid and vapour |
H227 | Combustible liquid |
H228 | Flammable solid |
H229 | Pressurized container: may burst if heated |
H230 | May react explosively even in the absence of air |
H231 | May react explosively even in the absence of air at elevated pressure and/or temperature |
H240 | Heating may cause an explosion |
H241 | Heating may cause a fire or explosion |
H242 | Heating may cause a fire |
H250 | Catches fire spontaneously if exposed to air |
H251 | Self-heating; may catch fire |
H252 | Self-heating in large quantities; may catch fire |
H260 | In contact with water releases flammable gases which may ignite spontaneously |
H261 | In contact with water releases flammable gas |
H270 | May cause or intensify fire; oxidizer |
H271 | May cause fire or explosion; strong oxidizer |
H272 | May intensify fire; oxidizer |
H280 | Contains gas under pressure; may explode if heated |
H281 | Contains refrigerated gas; may cause cryogenic burns or injury |
H290 | May be corrosive to metals |
Health hazards | |
Code | Phrase |
H300 | Fatal if swallowed |
H301 | Toxic if swallowed |
H302 | Harmful if swallowed |
H303 | May be harmful if swallowed |
H304 | May be fatal if swallowed and enters airways |
H305 | May be harmful if swallowed and enters airways |
H310 | Fatal in contact with skin |
H311 | Toxic in contact with skin |
H312 | Harmful in contact with skin |
H313 | May be harmful in contact with skin |
H314 | Causes severe skin burns and eye damage |
H315 | Causes skin irritation |
H316 | Causes mild skin irritation |
H317 | May cause an allergic skin reaction |
H318 | Causes serious eye damage |
H319 | Causes serious eye irritation |
H320 | Causes eye irritation |
H330 | Fatal if inhaled |
H331 | Toxic if inhaled |
H332 | Harmful if inhaled |
H333 | May be harmful if inhaled |
H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled |
H335 | May cause respiratory irritation |
H336 | May cause drowsiness or dizziness |
H340 | May cause genetic defects |
H341 | Suspected of causing genetic defects |
H350 | May cause cancer |
H351 | Suspected of causing cancer |
H360 | May damage fertility or the unborn child |
H361 | Suspected of damaging fertility or the unborn child |
H361d | Suspected of damaging the unborn child |
H362 | May cause harm to breast-fed children |
H370 | Causes damage to organs |
H371 | May cause damage to organs |
H372 | Causes damage to organs through prolonged or repeated exposure |
H373 | May cause damage to organs through prolonged or repeated exposure |
Environmental hazards | |
Code | Phrase |
H400 | Very toxic to aquatic life |
H401 | Toxic to aquatic life |
H402 | Harmful to aquatic life |
H410 | Very toxic to aquatic life with long-lasting effects |
H411 | Toxic to aquatic life with long-lasting effects |
H412 | Harmful to aquatic life with long-lasting effects |
H413 | May cause long-lasting harmful effects to aquatic life |
H420 | Harms public health and the environment by destroying ozone in the upper atmosphere |
Sorry,this product has been discontinued.
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