反应详情

To a solution of (6-fluoro-2,3,4,9-tetrahydro-1H-carbazol-3-yl)acetonitrile (0.423 g, 1.857 mmol) in ethanol (55 mL) kept under nitrogen was added concentrated aqueous ammonia (38 mL) followed by 5% rhodium on alumina catalyst (40% by weight). The mixture was hydrogenated at room temperature and 50 psi for 24 hours. Following TLC, additional catalyst (1.130 g) was added and the hydrogenation was resumed. After 6 hours the catalyst was filtered off over Celite, the cake washed with ethanol and the filtrate evaporated to dryness at reduced pressure. The residue was treated with a small amount of ethanol and evaporated. The procedure was performed three times. The residual oil was purified by flash chromatography on silica gel Merck-60 using a gradient from 2:248 to 10:90 of ammonia saturated methanol in dichloromethane. The desired title compound was obtained as a pale yellow foam (0.405 g). MS (ES): [M−H]− @231.1.

1. customwas hydrogenated at room temperature
2. filtrationAfter 6 hours the catalyst was filtered off over Celite
3. washthe cake washed with ethanol
4. customthe filtrate evaporated to dryness at reduced pressure
5. additionThe residue was treated with a small amount of ethanol
6. customevaporated
7. customThe residual oil was purified by flash chromatography on silica gel Merck-60