Platinum-Catalyzed Tandem Diboration/Intramolecular Allylboration: Diastereoselective Access to Cyclohexanes Bearing 1,3-Diols
作者:James P. Morken、C. Eric Ballard
DOI:10.1055/s-2004-822379
日期:——
A tandem reaction sequence consisting of platinum-catalyzed diboration of 1,3-dienes followed by intramolecular allylboration and oxidative hydrolysis has been developed for constructing cyclic structures that bear a 1,3-diol. This methodology has proven effective for synthesizing cyclohexanes from dienals in good yields (44-64%) to generate diols containing two new vicinal stereocenters, one of which
已经开发了由铂催化的 1,3-二烯二硼化然后分子内烯丙基硼化和氧化水解组成的串联反应序列,用于构建带有 1,3-二醇的环状结构。该方法已被证明可有效地以良好的收率 (44-64%) 从二烯醛合成环己烷,以生成含有两个新的邻位立体中心的二醇,其中一个是四元的。产品以高区域和非对映体比率 (>19:1) 获得。基材上预先存在的立体中心可以在产品中提供高水平的不对称感应。