Highly Stereocontrolled Synthesis of <i>trans</i>-2,6-Disubstituted-5-methyl-3,6-dihydropyrans: Stereoselective Synthesis of the Bicyclic Core of Penostatin B
作者:D. Srinivas Reddy、Birakishore Padhi、Debendra K. Mohapatra
DOI:10.1021/jo502101u
日期:2015.2.6
An efficient, mild, and highly diastereoselective strategy for the synthesis of trans-2,6-disubstituted-5-methyl-3,6-dihydropyran ring systems has been developed starting from δ-hydroxy α-methyl α,β-unsaturated aldehydes and allyltrimethylsilane in the presence of a catalytic amount of ZnBr2 in a highly diastereoselective manner with excellent yield. The versatility of the above method was also demonstrated
用于合成一种高效,温和,高立体选择性策略反式- 2,6-二取代-5-甲基-3,6-二氢吡喃环系统已经开发从δ羟基α甲基α,β不饱和醛和起始烯丙基三甲基硅烷在催化量的ZnBr 2存在下,以高度非对映选择性的方式具有出色的收率。还证明了上述方法的多功能性,以简洁和高度立体选择性的方式构建了存在于抑素B中的双环核。