Asymmetric michael additions of ester enolates to enantiomerically pure vinylic sulfoxides
作者:Gary H. Posner、Moshe Weitzberg、Terence G. Hamill、Edward Asirvatham、He Cun-heng、Jon Clardy
DOI:10.1016/s0040-4020(01)90581-2
日期:1986.1
donors to enantiomerically pure Michael acceptor cycloalkenone sulfoxides 1a and 1b and unsaturated lactone sulfoxides 3a and 3b. The level of asymmetric induction in some cases is extraordinarily high (95% e.e. of final 1,5-dicarbonyl products). Adduct ester lactones 5 and 6 can be converted easily into some synthetically versatile, trifunctional, 3-substituted glutarate esters of high enantiomeric purity
各种酯烯酸酯离子作为迈克尔供体加入对映体纯的迈克尔受体环烯酮亚砜1a和1b和不饱和内酯亚砜3a和3b。在某些情况下,不对称诱导的水平非常高(最终的1,5-二羰基产物的ee为95%)。加合物酯内酯5和6可以很容易地转化为一些具有高对映体纯度的合成上通用的三官能3取代的戊二酸酯。提出了对映体纯的戊烯内酯亚砜(S)-(+)- 3b的有效途径。