Concise Synthesis of Chiral N-Benzyl-α,α-Diarylprolinols through Shi Asymmetric Epoxidation
摘要:
A concise and practical synthesis of chiral N-benzyl-alpha,alpha-diaryl-2-prolinols was developed through Shi asymmetric epoxidation, followed by double nucleophilic substitution of bromo-containing olefins. A series of enantioenriched N-benzyl-alpha,alpha-diaryl-2-prolinols were obtained with excellent enantioselectivities (96% ee) in moderate to good yields (40-76% yield). For the first time, enantiopure N-benzyl-alpha,alpha-diphenyl-2-prolinol was obtained from bromo-containing olefin using this methodology.
N-aryl-piperazinealkanamides useful for improving sleep
申请人:Janssen Pharmaceutica N.V.
公开号:US04880808A1
公开(公告)日:1989-11-14
A method of improving sleep in warm-blooded animals suffering from sleep disorders, which method comprises the administration of particular N-aryl-piperazinealkanamide derivatives and compositions containing the same. Novel N-aryl-piperazinealkanamide derivatives.
A method of improving sleep in warm-blooded animals suffering from sleep disorders, which method comprises the administration of particular N-aryl-piperazinealkanamide derivatives and compositions containing the same. Novel N-aryl-piperazinealkanamide derivatives.
A method of improving sleep in warm-blooded animals suffering from sleep disorders, which method comprises the administration of particular N-aryl-piperazinealkanamide derivatives and compositions containing the same. Novel N-aryl-piperazinealkanamide derivatives.