3-(1H-吲哚-3-基)-3-氧代-丙腈

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 3-(1H-indol-3-yl)-3-oxo-propionitrile (6.4 g, 34.7 mmol, 1.0 eq), in absolute EtOH (40 mL), hydrazine monohydrate (5.0 mL, 104.1 mmol, 3.0 eq) was added and the reaction was heated at reflux for 24 hours. The reaction mixture was allowed to cool to room temperature; the solid was filtered and washed with Et2O/EtOAc 10/1 to give 3.0 g of title product (yield 74%). the reaction was heated at reflux for 24 hours the solid was filtered washed with Et2O/EtOAc 10/1

反应条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: In a flask, cyanoacetic acid (5.0 g, 58.8 mmol, 1.2 eq) was dissolved in acetic anhydride (50 mL) and heated at 50° C. Indole (5.8 g, 50.0 mmol, 1.0 eq) was added and the reaction was heated at 80° C. for 5 min. A white precipitate crushed out of the solution; the reaction was cooled to room temperature and then filtered. The solid obtained (620.0 mg, 85% yield) was used for the next step without further purification. the reaction was heated at 80° C. for 5 min A white precipitate crushed out of the solution the reaction was cooled to room temperature filtered The solid obtained (620.0 mg, 85% yield) was used for the next step without further purification

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 3-(Cyanoacetyl)indole was prepared by suspending indole (11.71 g, 0.10 mmol) and potassium cyanoacetate (24.6 g, 0.2 mmol) in acetonitrile (300 mL), and to this methanesulphonylchloride (7.7 mL, 0.1 mmol) was added. The resulting mixture was stirred at ambient temperature for 1 h, and then sodium carbonate (10 g in 50 mL water) was added. After 5 min, the organic phase was separated, dried (Na2SO4) and concentrated under reduced pressure. The residue was recrystallised from ethanol (100 mL) to give the desired material as an orange solid (4.31 g), m.p. 226-227°. δH (d6 DMSO) 12.20 (1H, bs), 8.38 (1H, d, J 2.8 Hz), 8.14-8.10 (1H, m), 7.53-7.50 (1H, m), 7.25-7.21 (2H, m) and 4.49 (2H, s). After 5 min the organic phase was separated dried (Na2SO4) concentrated under reduced pressure The residue was recrystallised from ethanol (100 mL)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 1-indol-3-yl-2-cyano-3-dimethylaminopropen-1-one was prepared from 3-(cyanoacetyl) indole (4.0 g, mmol) and dimethylformamide dimethylacetal (4.1 mL, 23.9 mmol) as a yellow solid (2.4 g), m.p. 187-188°. δH (d6 DMSO) 11.73 (1H, bs), 8.26 (1H, s), 8.12 (1H, dd, J 6.8, 1.3 Hz), 7.98 (1H, s), 7.47-7.44 (1H, m), 7.20-7.09 (2H, m), 3.35 (3H, s) and 3.26 (3H, s).