Asymmetric synthesis via acetal templates. 15. The preparation of enantiomerically pure mevinolin analogs
作者:William S. Johnson、Andrew B. Kelson、John D. Elliott
DOI:10.1016/s0040-4039(00)82107-3
日期:1988.1
An efficient asymmetric synthesis of the hydroxylactone moiety of mevinolin 1 is described. The key step is the TiCl4-catalyzed coupling reaction of acetals 3a and 3b derived from (R)-1,3-butanediol with 1,3-bis(trimethylsilyloxy)-1-methoxybuta-1,3-diene 4 to give the δ-alkoxy-β-keto ester 5.
Mevinolin 1的羟基内酯部分的有效不对称合成进行了描述。关键的步骤是将TiCl 4缩醛催化的偶联反应图3a和3b中,从(R)-1,3-丁二醇衍生与1,3-双(三甲基甲硅烷)-1- methoxybuta -1,3-二烯4,得到δ-烷氧基-β-酮酸酯5。