Ple-catalyzed resolution of α-substituted β-ketoesters application to the synthesis of (+)-nitraniine and (−)-Isonitramine
摘要:
Substituted beta-Ketoesters can be prepared in enantiomerically pure form by pig liver esterase catalyzed hydrolysis of their racemic precursors. With the asymmetric carbon atom possessing a quaternary centre, (+)-Nitramine and (-)-Isonitramine have been synthesized.
Ple-catalyzed resolution of α-substituted β-ketoesters application to the synthesis of (+)-nitraniine and (−)-Isonitramine
摘要:
Substituted beta-Ketoesters can be prepared in enantiomerically pure form by pig liver esterase catalyzed hydrolysis of their racemic precursors. With the asymmetric carbon atom possessing a quaternary centre, (+)-Nitramine and (-)-Isonitramine have been synthesized.
Asymmetric nucleophilic addition of chiral β - enamino esters to acrylonitrile
作者:André Guingant、Hedi Hammami
DOI:10.1016/s0957-4166(00)86008-5
日期:1993.1
β - enamino esters derived from β - keto esters and (S)-1- phenylethytamine, react with acrylonitrile in the presence of a Lewis acid or under high pressure activation to give, after hydrolytic work up, α,α- disubstituted β - keto esters 4 (EWG=CN) in enantiomeric excesses close lo 90%.