A rapid, simple route to homochiral α,β-epoxyketones
摘要:
Substituted E- or Z-acrylylamides derived from a homochiral amine such as (R,R)-2,5-dimethylpyrrolidine or (S,S)-bis(2-phenylethyl)amine are readily epoxidised with complete stereocontrol with t-BuO2Li to give two readily separated, enantiomerically pure diastereomeric epoxides. The easily separated epoxides are efficiently converted into alpha,beta-epoxyketones by the action of organolithiums with 92->99% ee. (C) 1999 Elsevier Science Ltd. All rights reserved.
A rapid, simple route to homochiral α,β-epoxyketones
摘要:
Substituted E- or Z-acrylylamides derived from a homochiral amine such as (R,R)-2,5-dimethylpyrrolidine or (S,S)-bis(2-phenylethyl)amine are readily epoxidised with complete stereocontrol with t-BuO2Li to give two readily separated, enantiomerically pure diastereomeric epoxides. The easily separated epoxides are efficiently converted into alpha,beta-epoxyketones by the action of organolithiums with 92->99% ee. (C) 1999 Elsevier Science Ltd. All rights reserved.