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CAS No. : | 15029-30-8 | MDL No. : | MFCD00006487 |
Formula : | C8H12N2O | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | ANLQHFYDQPMDJY-UHFFFAOYSA-N |
M.W : | 152.19 | Pubchem ID : | 84765 |
Synonyms : |
|
Num. heavy atoms : | 11 |
Num. arom. heavy atoms : | 0 |
Fraction Csp3 : | 0.75 |
Num. rotatable bonds : | 2 |
Num. H-bond acceptors : | 2.0 |
Num. H-bond donors : | 0.0 |
Molar Refractivity : | 45.22 |
TPSA : | 44.1 Ų |
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) : | -6.9 cm/s |
Log Po/w (iLOGP) : | 1.47 |
Log Po/w (XLOGP3) : | 0.46 |
Log Po/w (WLOGP) : | 0.53 |
Log Po/w (MLOGP) : | 0.17 |
Log Po/w (SILICOS-IT) : | 1.04 |
Consensus Log Po/w : | 0.73 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 1.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -0.94 |
Solubility : | 17.4 mg/ml ; 0.114 mol/l |
Class : | Very soluble |
Log S (Ali) : | -0.95 |
Solubility : | 16.9 mg/ml ; 0.111 mol/l |
Class : | Very soluble |
Log S (SILICOS-IT) : | -1.03 |
Solubility : | 14.3 mg/ml ; 0.094 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 0.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 1.4 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P301+P312-P302+P352-P304+P340-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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* 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 |
---|---|---|
92% | In neat (no solvent) at 20℃; Inert atmosphere; | Preparation of N-substituted cyanacetamides 1 and 4 - precursors to the cyanoximes Neat ethylcyanoacetate reacts at room temperature with neat secondary amines at solvent-free conditions to form respective amides [44,45]. The general procedure involves mixing neat piperidine or morpholine with NC-CH2-C(O)OC2H5 at 1.5:1 ratio under stirring and an N2 blanket. These reactions within 24-60h at room temperature lead to prePiPCO (1) and preMCO (4) in high yields (Scheme 1). Course of both reactions was monitored by TLC watching disappearance of the cyanoacetylacetate. Since starting compounds and final cyan-acetamides do not contain chromophores, an I2-chamber was used for plates’ development. Thus, thick off-white precipitates of 1 and 4 were filtered under vacuum, washed with small portions (∼20mL) of toluene and hexane (∼25mL), and then dried in a vacuum dessicator charged with concentrated H2SO4 for several days until smell of the amine was no longer detectable. Data for 1: yield 92%, m.p. 87-90°C. The ring methylene protons in both precursors and target cyanoximes demonstrate complex non-first order 1H NMR spectra of AA′BB′ spin systems. The 1H NMR, ppm, in dmso-d6: 4.01 (singlet, 2H), ring protons - 3.41 (“triplet”, 2H), 3.28 (“tiplet”, 2H), 1.53 (multiplet, 6H). Mass-spectrometry, positive FAB (Ar): for C8H12N2O, calculated - 152.12 (found - 152.1). Data for 4: yield ∼100%, m.p. 78-81°C, Rf=0.12 in EtOAc/hexane (1:2) mobile phase. The 1H NMR, ppm, in dmso-d6: 4.03 (singet, 2H), ring protons - 3.56 (“quartet”, 4H - next to O), 3.43 (“triplet”, next to N), 3.34 (“triplet”, next to N). Mass-spectrometry, positive FAB (Ar): for C7H10N2O2, calculated - 154.07 (found - 154.08). |
60% | In ethanol at 20℃; | 4.7. Preparation of cyanoacetamides 7(a-q) General procedure: In a simply obtainable screw cap bottle, a mixture of ethylcyanoacetate6 (1.2 mmol) and the suitable amine (1 mmol) in EtOH (10 mL)was stirred at RT for 4-8 h. After completion as indicated by TLC, thereaction liquid was refrigerated down to 4 °C in an ice bath. In severalcases, the precipitation of amide usually took later than some minutesto hours [12]. Filtered off the formed solid, rinsed with ether numeroustimes to obtain pure 7(a-q) in corresponding yield. |
37% | With sodium ethanolate In ethanol at 20℃; for 24h; | 4.2. General procedure 1: synthesis of cyanoacetamides 2a-d General procedure: A mixture of a solution of sodium ethoxide (0.1 mmol) in ethanol (3 mL), ethyl cyanoacetate (10 mmol) and amine (10 mmol) was stirred at room temperature. The reaction time is 1 h for primary amines and 24 h for secondary amine 2d. The precipitate obtained was separated by filtration, washed with diethylether and recrystallised in ethanol to provide a white solid of cyanoacetamides. |
at 20℃; Inert atmosphere; neat liquid; | ||
at 20 - 70℃; | 4.2. General procedure for the preparation of cyanoacetamide oximes (15-18)45 General procedure: Ethyl cyano acetic ester (11.3 g, 100 mmol) and amines (morpholine, piperidine, ethyl amine) (150 mmol) were stirred at 70 °C for 6 h, then left to stir at room temperature overnight. The product precipitated, was filtered and washed with diethyl ether to give the desired 2-cyanoacetamide derivatives, which were used without further purification in the next nitrosation step. Into an ice cooled solution of 2-acetonitrile derivatives (100 mmol) and sodium hydroxide (4 g, 100 mmol) in methanol (30 mL) was introduced gaseous methyl nitrite,45 which was generated from a suspension of sodium nitrite (8.3 g) in a mixture of methanol (10 mL) and water (10 mL) by dropwise addition of a mixture of concentrated sulfuric acid (5 mL) and water (10 mL). The mixture was stirred for 2 h at room temperature and concentrated to dryness. The residue was dissolved in the least amount of water (5 mL), ice cooled, and acidified with concentrated hydrochloric acid to precipitate. In some cases precipitation occurs only by the addition of diethyl ether. | |
for 0.5h; Reflux; | ||
at 20℃; for 50h; | ||
In ethanol at 20℃; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With ethanol |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With orthoformic acid triethyl ester |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With potassium <i>tert</i>-butylate at 140℃; for 0.05h; microwave irradiation; | |
at 100℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | With piperidine In isopropyl alcohol for 13h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With piperidine In isopropyl alcohol for 13h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 5% 2: 95% | With sodium methylate In tetrahydrofuran at 0℃; for 0.1h; | |
With sodium methylate 1) THF, 15 min, 2) THF, 0 deg C, 48h; Yield given. Multistep reaction. Yields of byproduct given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
78% | With sodium methylate In tetrahydrofuran at 0℃; for 0.1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sulfuric acid; acetic acid In benzene at 60℃; for 0.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 10% 2: 89% | With sodium methylate In tetrahydrofuran at 0℃; for 0.1h; | |
With sodium methylate 1) THF, 15 min, 2) THF, 0 deg C, 3h; Yield given. Multistep reaction. Yields of byproduct given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
79% | With sodium methylate In tetrahydrofuran at 0℃; for 0.1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | With sodium methylate In tetrahydrofuran at 0℃; for 0.1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With sodium methylate In tetrahydrofuran at 0℃; for 0.1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | With piperidine In isopropyl alcohol for 13h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | With piperidine In isopropyl alcohol for 13h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1: 38% 2: 16% | With piperidine In ethanol 1.) reflux, 2 h, 2.) RT, 16 h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
84% | With trichlorophosphate In 1,4-dioxane at 75 - 80℃; for 4h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
19% | With triethylamine In dichloromethane for 0.5h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
32% | With triethylamine In dichloromethane for 1h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
32% | With triethylamine In dichloromethane for 2h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77.5% | With triethylamine In chloroform |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77.5% | With triethylamine In chloroform |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77.5% | With triethylamine In chloroform |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydroxide In toluene at 0℃; for 0.166667h; Yield given; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
54.3% | With piperidine In ethanol at 50 - 60℃; for 4h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
55.1% | With diphosphorus pentasulfide In 1,4-dioxane at 100℃; for 1h; | |
38% | With tetraphosphorus decasulfide In tetrahydrofuran at 50℃; for 0.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With sodium ethanolate In ethanol Ambient temperature; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With sodium ethanolate In ethanol Ambient temperature; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
67% | With sodium ethanolate In ethanol Ambient temperature; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With sodium ethanolate In ethanol Ambient temperature; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
68% | With sodium ethanolate In ethanol Ambient temperature; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
26% | With sodium methylate In methanol for 24h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In dichloromethane at 25℃; for 1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
78% | In acetonitrile at 25℃; for 48h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92% | In dichloromethane at 25℃; for 15h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | In acetonitrile at 25℃; for 48h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With sodium hydride In dichloromethane at 25℃; for 1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81% | In dichloromethane at 25℃; for 24h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In dichloromethane at 25℃; for 1h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | In benzene for 1h; Ambient temperature; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
71% | In acetonitrile at 25℃; for 48h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81% | In acetonitrile at 25℃; for 48h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
56% | With sodium hexamethyldisilazane In tetrahydrofuran 1.) -20-0 deg C, 2.) 50 deg C, 24 h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
56% | Stage #1: 1-cyanoacetylpiperidine With lithium diisopropyl amide In tetrahydrofuran at 0℃; for 0.166667h; Stage #2: N,N'-di(p-tolyl)oxaldiimidoyl dichloride In tetrahydrofuran at -20 - 50℃; for 24h; Further stages.; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
73% | With hydrogen sulfide; triethylamine In ethanol at 70℃; for 1.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 16h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
66% | With aluminium trichloride; sodium azide In tetrahydrofuran for 336h; Heating; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: 1-cyanoacetylpiperidine; methyl iodide With n-butyllithium In tetrahydrofuran; hexane at -78℃; for 1.5h; Stage #2: With ammonium chloride | 393.A EXAMPLE 393 ;2-[(2-[2,2-Dimethyl-3-(1-piperidinyl)propyl]amino}phenyl)sulfonyl]amino}-8-methyl-5,6,7,8-tetrahydro-1-naphthalenecarboxylic acid; EXAMPLE 393A; 2,2-Dimethyl-3-oxo-3-(1-piperidinyl)propanenitrile EXAMPLE 393 2-[(2-[2,2-dimethyl-3-(1-piperidinyl)propyl]amino}phenyl)sulfonyl]amino}-8-methyl-5,6,7,8-tetrahydro-1-naphthalenecarboxylic acid EXAMPLE 393A 2,2-dimethyl-3-oxo-3-(1-piperidinyl)propanenitrile [0707] A solution of 1-cyanoacetylpiperidine (2.28 g, 15 mmol) in 60 mL THF was cooled to -78° C., treated with 1.6M n-butyllithium in hexanes (20.63 mL, 33 mmol), stirred at -78° C. for 30 minutes, treated with methyl iodide (4.67 mL, 75 mmol), stirred at -78° C. for 1 hour, warmed to room temperature, stirred overnight, and treated with 15 mL of ammonium chloride and 100 mL of ethyl acetate. The organic layer was washed with brine (3×), dried (MgSO4), filtered, and concentrated. The residue was purified by silica gel column chromatography, eluting with 20% acetone in n-hexanes to give 1.01 g of the desired product. MS (DCI) m/e 198 (M+NH4)+; 1H NMR (300 MHz, DMSO-d6) δ 3.34-3.68 (m, 4H), 1.61 (s, 6H), 1.34 (m, 2H), 1.13 (m, 2H), 0.87-0.92 (m, 2H). | |
With n-butyllithium; ammonium chloride In tetrahydrofuran; ethyl acetate | 393.A 2,2-dimethyl-3-oxo-3-(1-piperidinyl)propanenitrile EXAMPLE 393A 2,2-dimethyl-3-oxo-3-(1-piperidinyl)propanenitrile A solution of 1-cyanoacetylpiperidine (2.28 g, 15 mmol) in 60 mL THF was cooled to -78° C., treated with 1.6M n-butyllithium in hexanes (20.63 mL, 33 mmol), stirred at -78° C. for 30 minutes, treated with methyl iodide (4.67 mL, 75 mmol), stirred at -78° C. for 1 hour, warmed to room temperature, stirred overnight, and treated with 15 mL of ammonium chloride and 100 mL of ethyl acetate. The organic layer was washed with brine (3*), dried (MgSO4), filtered, and concentrated. The residue was purified by silica gel column chromatography, eluding with 20% acetone in n-hexanes to give 1.01 g of the desired product. MS (DCI) m/e 198 (M+NH4)+; 1H NMR (300 MHz, DMSO-d6) δ 3.34-3.68 (m, 4H), 1.61 (s, 6H), 1.34 (m, 2H), 1.13 (m, 2H), 0.87-0.92 (m, 2H). | |
With sodium hydroxide In dimethyl sulfoxide at 15 - 20℃; for 2h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
25% | With triethylamine In toluene for 30h; Heating / reflux; | 5 REFERENCE EXAMPLE 5, 2-[2-Oxo-2-(1-piperidinyl)ethylidene]-2,3-dihydro-4H-1,3-benzothiazin-4-one REFERENCE EXAMPLE 5 2-[2-Oxo-2-(1-piperidinyl)ethylidene]-2,3-dihydro-4H-1,3-benzothiazin-4-one Methyl thiosalicylate (1.7 g, 10.1 mM) and 1-cyanoacetylpiperidine (2.0 g, 13.1 mM) were dissolved in toluene (5 ml), and triethylamine (2 ml, 14.4 mM) was added to the solution. After heating for 30 hours under reflux, the reaction solution was concentrated to give crude crystals. The crude crystals were recrystallized from ethanol to give the title compound as needles (730 mg, 25%). NMR (CDCl3) δ: 1.30-1.80 (m,6H), 3.30-3.70 (m,4H), 5.30 (s,1H), 6.90-7.60 (m,3H), 8.27 (dd,1H,J=8Hz,J=2Hz). IR(KBr)cm-1:1660, 1595, 1560. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In toluene | R.5 2-[2-oxo-2-(1-piperidinyl)ethylidene]-2,3-dihydro-4H-1,3-benzothiazin-4-one (Compound 5) Reference Example 5 2-[2-oxo-2-(1-piperidinyl)ethylidene]-2,3-dihydro-4H-1,3-benzothiazin-4-one (Compound 5) Methyl thiosalicylate (1.7 g, 10.1 mM) and 1-cyanoacetyl piperidine (2.0 g, 13.1 mM) were dissolved in toluene (5 ml), and then triethylamine (2 ml, 14.4 mM) was added thereto. After heating under reflux for 30 hours, the reaction solution was concentrated to give crude crystals. The product was recrystallized from ethanol to give the title compound as needle crystals (730 mg, 25%). Elemental Analysis for C15H16N2O2S calcd.(%) C: 62.48, H: 5.59, N: 9.71 found (%) C: 62.22, H: 5.58, N: 9.65 1H-NMR (CDCl3) δ: 1.30-1.80 (m, 6H), 3.30-3.70 (m, 4H), 5.30 (s, 1H), 6.90-7.60 (m, 3H), 8.27 (dd, 1H, J=8 Hz, J=2 Hz) IR (KBr): 1660, 1595, 1560 (cm-1) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With n-butyllithium In tetrahydrofuran; hexane | 405.A 2-ethyl-2-(1-piperidinylcarbonyl)butanenitrile EXAMPLE 405A 2-ethyl-2-(1-piperidinylcarbonyl)butanenitrile The compound was synthesised from 1-cyanoacetylpiperidine (1.52 g, 10 mmol), bromoethane (3.73 mL, 50 mmol) and 1.6M n-butyllithium in hexane (13.75 mL, 22 mmol) in 40 mL of THF according to the method described in Example 393A to give 0.92 g. MS (ESI(+)) m/e 209 (M+H)+ 226 (M+NH4)+; 1H NMR (300 MHz, DMSO-d6) δ 3.44-3.67 (m, 4H), 2.00-2.10 (m, 2H), 1.79-1.86 (m, 2H), 1.43-1.70 (m, 6H), 1.03-1.07 (m, 6H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With dicyclohexyl-carbodiimide In dichloromethane at 20℃; Reflux; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
13% | With ammonium acetate; In methanol; for 3h;Reflux; | A solution of 3-oxo-3-(piperidin-1-yl)propanenitrile (300 mg, 2 mmol), 3,4- dihydroxy-5- nitrobenzaldehyde (273 mg, 1.5 mmol) and NH4OAc (924 mg, 12 mmol) in MeOH (15 mL) was heated to reflux for 3 hours. The solid was filtered and washed by MeOH and H20 to give the crude product. The solid dissolved in MeOH (5 mL) was added 1N.HC1 (0.5 mL), the color was changed and the solid was formed, the solid was filtered and washed by H20, dried in vacuo to give the (E)-3-(3,4-dihydroxy-5-nitrophenyl)-2-(piperidine-1- carbonyl)acrylonitrile as a bright yellow solid (60 mg, 13%). ?H NMR (400 IVIFIz, DMSO) 10.86 (s, 2H), 7.92 (d, J= 2.1 Hz, 1H), 7.75 (d, J= 2.0 Hz, 1H), 7.63 (s, 1H), 3.56- 3.45 (m, 4H), 1.55-1.62 (m, 6H). MS [MH] calcd for C,5H,5N305 318.3, found 318.0. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: 1-cyanoacetylpiperidine With potassium hydroxide In N,N-dimethyl-formamide for 0.5h; Stage #2: phenyl isothiocyanate In N,N-dimethyl-formamide at 20℃; for 3h; Stage #3: 2-oxo-N-(4-chlorophenyl)propanehydrazonoyl chloride In N,N-dimethyl-formamide for 12.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: 1-cyanoacetylpiperidine With potassium hydroxide In N,N-dimethyl-formamide for 0.5h; Stage #2: phenyl isothiocyanate In N,N-dimethyl-formamide at 20℃; for 3h; Stage #3: 1-chloro-1-(p-tolylhydrazone)propanone In N,N-dimethyl-formamide for 12.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
76% | Stage #1: 1-cyanoacetylpiperidine With potassium hydroxide In N,N-dimethyl-formamide for 0.5h; Stage #2: phenyl isothiocyanate In N,N-dimethyl-formamide at 20℃; for 3h; | |
75% | With potassium hydroxide In tetrahydrofuran at 20℃; for 48h; Cooling with ice; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: 1-cyanoacetylpiperidine With potassium hydroxide In N,N-dimethyl-formamide for 0.5h; Stage #2: phenyl isothiocyanate In N,N-dimethyl-formamide at 20℃; for 3h; Stage #3: α-oxo-α-methyl-N-(p-sulfamoylphenyl)ethanehydrazonoyl chloride In N,N-dimethyl-formamide for 12.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Stage #1: 1-cyanoacetylpiperidine With potassium hydroxide In N,N-dimethyl-formamide for 0.5h; Stage #2: phenyl isothiocyanate In N,N-dimethyl-formamide at 20℃; for 3h; Stage #3: 1-(N-phenylhydrazono)-1-chloropropanone In N,N-dimethyl-formamide for 12.5h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
8% | Stage #1: 1-cyanoacetylpiperidine; 6-chloro-3-(2-phenylacetyl)-1H-indole-2-carboxylate With titanium tetrachloride; triethylamine In tetrahydrofuran at 40℃; Stage #2: With sulfur; triethylamine In ethanol at 50℃; for 48h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
93% | Stage #1: 1-cyanoacetylpiperidine; 3-Hydroxy-3-methyl-2-butanone With sodium ethanolate In ethanol at 20℃; for 24h; Stage #2: With hydrogenchloride; water Stage #3: With potassium carbonate In water | 4.3. General procedure 2: synthesis of N-alkyl-2,5-dihydro-2-imino-4,5,5-trialkylfuran-3-carboxamide 3a-d General procedure: A mixture of 3-hydroxy-3-methylbutan-2-one 1 (10 mmol) and the substituted cyanoacetamides 2a-d (10 mmol) with a solution of sodium ethoxide (0.5 mmol) in ethanol (10 mL) was stirred at room temperature. After evaporation of the solvent, the residue was acidified with 6 M aqueous HCl. The mixture was neutralised with a solution of potassium carbonate (10%), then extracted with CH2Cl2 (3×25 mL). The combined organic layers were dried on MgSO4, filtered and concentrated in vacuum. The recovered solid was recrystallised in ethanol to provide compounds 3a-d. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
21% | In toluene at 100℃; for 4h; | Dimethylaminoacrylamide Sd-2 Sd-1 was prepared from piperidine according to the literature procedure1. To a solution of Sd-1 (1.25 g, 8.21 mmol) in toluene (20 mL) was added N,N-dimethylformamide dimethylacetal (1.64 mL, 12.3 mmol) at room temperature. The mixture was stirred at 100 °C for 4 h, when TLC indicated the reaction was complete. The reaction mixture was then concentrated in vacuo. The residue was collected by filtration and washed with ether (three times) to give pure Sd-2 (358 mg, 21%) as white solid. |
In toluene at 80℃; for 6h; |
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1-(Piperidin-1-yl)octadecan-1-one
Similarity: 0.82