反应详情

To a solution of (4-{[tert-butyl(dimethyl)silyl]oxy}-1H-indol-1-yl)acetonitrile (259 mg, 0.904 mmol) in tetrahydrofuran (20 mL) are added a 2.0M hydrochloric acid in ethanol (1 mL) and active Raney-nickel (manufactured by Kawaken Fine Chemicals Co., Ltd., about 1 mL), and the mixture is vigorously stirred under hydrogen atmosphere under pressure (0.5 Pa) at room temperature for 1 hour. To the mixture is further added active Raney-nickel (about 1.5 mL), and the mixture is vigorously stirred under the same conditions for 4 hours. The catalyst is removed by filtration through celite, and the filtrate is concentrated under reduced pressure. The obtained residue is purified by silica gel column (ammonia-chloroform:methanol=100:1→50:1→30:1) to give the title compound as pale brown oil (207 mg, yield: 79%).

1. stirringthe mixture is vigorously stirred under the same conditions for 4 hours
2. customThe catalyst is removed by filtration through celite
3. concentrationthe filtrate is concentrated under reduced pressure
4. customThe obtained residue is purified by silica gel column (ammonia-chloroform:methanol=100:1→50:1→30:1)