反应详情

温度

50 °C

2-chloro-1-methylpyridinium iodide (1.930 g) was added to a solution of 1H-indole-7-carbaldehyde oxime (D1) (1.1 g) in dry THF (80 mL) at RT. After stirring for 10 min, triethylamine (3.35 mL) was added dropwise to the reaction mixture. The reaction mixture was stirred at RT for 2 hours, then was heated to 50° C. and stirred at 50° C. for 2.5 hours. The solvent was evaporated. The residue was dissolved in EtOAc (100 mL) and water (100 mL) was added. The organic fraction was separated, washed with aqueous HCl (0.5 M, 50 mL). The organic fraction was dried over anhydrous magnesium sulfate. The dried solution was concentrated to afford 1H-indole-7-carbonitrile (D2) as a white solid (0.95 g). δH (DMSO-d6, 400 MHz): 6.64 (1H, m), 7.16 (1H, t), 7.56 (1H, m), 7.68 (1H, d), 7.93 (1H, d), 12.02 (1H, br s). MS (ES): C9H6N2 requires 142; found 141.0 (M−H+).

1. stirringThe reaction mixture was stirred at RT for 2 hours
2. stirringstirred at 50° C. for 2.5 hours
3. customThe solvent was evaporated
4. dissolutionThe residue was dissolved in EtOAc (100 mL)
5. additionwater (100 mL) was added
6. customThe organic fraction was separated
7. washwashed with aqueous HCl (0.5 M, 50 mL)
8. dry with materialThe organic fraction was dried over anhydrous magnesium sulfate
9. concentrationThe dried solution was concentrated