反应详情

N-Benzylpiperazine (40.0 ml) was added in one portion to a solution of succinimido 1-t-butoxycarbonylpiperidine-4-carboxylate (75.0 g) in dry dichloromethane (1600 ml). The solution was stirred at ambient temperature under an atmosphere of argon for 17 hours. The solution was washed with water (500 ml) and saturated brine (250 ml). The organic layer was dried (Na2SO4) and evaporated. The residual oil was purified by chromatography on alumina, eluting with dichloromethane to give 1-benzyl-4-[(1-t-butoxycarbonyl-4-piperidyl)carbonyl]piperazine as an oil;

1. washThe solution was washed with water (500 ml) and saturated brine (250 ml)
2. dry with materialThe organic layer was dried (Na2SO4)
3. customevaporated
4. customThe residual oil was purified by chromatography on alumina
5. washeluting with dichloromethane