Diastereoselectivity in the preparation of β-silylesters from αβ-unsaturated esters and amides attached to chiral auxiliaries
作者:Ian Fleming、Nicholas D. Kindon
DOI:10.1039/c39870001177
日期:——
phenyldimethylsilyl-cuprate reagent to cinnamate and crotonate esters and amides of various known chiral auxilaries is diastereoselective, making available β-silylesters of high enantiomeric excess; the sense of the diastereoselectivity is anomalously different from established precedent in the case of silyl-cuprate addition to the cinnamate ester (1, R = Ph, R*=d).
将苯基二甲基甲硅烷基-铜酸酯试剂共轭添加到各种已知手性助剂的肉桂酸酯和巴豆酸酯和酰胺中是非对映选择性的,可获得高对映体过量的β-甲硅烷基酯。当在肉桂酸酯中加入甲硅烷基铜酸酯时,非对映选择性的含义与已建立的先例异常不同(1,R = Ph,R * = d)。