Stereoselective synthesis of enantiopure 4,5-dihydroxy-2-alkene esters from simple allylic alcohols
作者:Marcel P.M. van Aar、Lambertus Thijs、Binne Zwanenburg
DOI:10.1016/0040-4020(95)00554-l
日期:1995.8
A general stereoselective synthesis of 4.5-dihydroxy-2-alkene esters is developed using the photo-induced rearrangement of α,β-epoxy diazomethyl ketones. Starting with readily available enantiopure allylic alcohols that contain a chiral center at C4, i.e. a protected secondary alcohol function, a neighboring stereogenic center is introduced by irradiation of the mentioned diazo ketones. The configuration
利用α,β-环氧重氮甲基酮的光诱导重排,开发了4.5-二羟基-2-烯烃酯的一般立体选择性合成。从容易获得的对映体纯的烯丙醇开始,其在C 4处具有手性中心,即受保护的仲醇官能团,通过辐照所述的重氮酮引入相邻的立体异构中心。这个新引入的中心的构型由烯丙醇的Sharpless环氧化合物中使用的手性感应剂决定,因此可以随意选择。