Enantioselective Alkylation of β-Keto Esters by Phase-Transfer Catalysis Using Chiral Quaternary Ammonium Salts
作者:Eun Joo Park、Mi Hee Kim、Dae Young Kim
DOI:10.1021/jo0401772
日期:2004.10.1
Catalytic enantioselective alkylation promoted by a quaternary ammonium salt from cinchonine as a phase transfer catalyst is described. Treatment of cyclo β-keto esters with alkyl halide under mild reaction conditions afforded the corresponding α-alkylated β-keto esters in moderate to excellent yields with high enantiomeric excesses
描述了由辛可宁作为相转移催化剂的季铵盐促进的催化对映选择性烷基化。在温和的反应条件下用烷基卤处理环β-酮酯,得到相应的α-烷基化的β-酮酯,产率中等至优异,对映体过量很高