Highly stereoselective radical addition to 3-hydroxy-1-(methylthio)-1-(p-tolylsulfonyl)-1-alkenes and its application to the preparation of optically active compounds
作者:Akio Kayano、Motohiro Akazome、Makoto Fujita、Katsuyuki Ogura
DOI:10.1016/s0040-4020(97)00545-0
日期:1997.8
Efficient 1,2-asymmetric induction was realized in the addition of a 1-hydroxyalkyl radical (R2C-OH) to 3-hydroxy-1-(methylthio)-1-(p-tolylsulfonyl)-1-alkenes and their acetates (1): Irradiation of 1 and benzophenone in an alcohol (R2CHOH) gave an adduct (2) with a high syn selectivity. Optically active 1 is easily obtainable by means of Lipase PS-catalyzed transesterification and, therefore, the present
通过在3-羟基-1-(甲硫基)-1-(对甲苯磺酰基)-1-烯烃及其乙酸酯中添加1-羟基烷基(R 2 C-OH)实现了有效的1,2-不对称诱导(1):在醇(R 2 CHOH)中照射1和二苯甲酮得到具有高顺式选择性的加合物(2)。光学活性的1是由脂肪酶PS催化的酯交换的方法,因此,本自由基不对称诱导提供了导致各种手性化合物的合成途径可以容易地获得。