反应详情

5-(3-Dimethylaminopropylidene)-3-methylsulfonyl-5H-dibenzo[a,d]cycloheptene (α-isomer), (1.39 g., 0.0039 mole), dissolved in 20 ml. of ethanol, is hydrogenated over Raney nickel at 65°C. under an initial hydrogen pressure of 440 p.s.i. The catalyst is separated and the solvent evaporated under reduced pressure. Recrystallization from cyclohexane gives 10,11-dihydro-5-(3-dimethylaminopropylidene)-3-methylsulfonyl-5H-dibenzo[a,d]cycloheptene (α-isomer), m.p. 121°-121.5°C. (sintered, 120°C.; cleared, 122.5°C.).

1. customThe catalyst is separated
2. customthe solvent evaporated under reduced pressure
3. customRecrystallization from cyclohexane