Metal-Free Difunctionalization of Alkynes with 2-Chlorodithiane for Synthesis of β-Ketodithianes
作者:Junshan Lai、Lixia Tian、Xing Huo、Yuan Zhang、Xingang Xie、Shouchu Tang
DOI:10.1021/acs.joc.5b00187
日期:2015.6.5
Dithianes are versatile umpolung intermediates in organic synthesis but have rarely been employed in radical cross-coupling reactions. Here we describe the oxidative coupling method for alkyne difunctionalization under metal-catalyst-free conditions. The efficient protocol directly affords a variety of β-ketodithianes in good to excellent yields with high regioselectivities. It provides a general pathway
二噻烷在有机合成中是多用途的杂酚中间体,但很少用于自由基交叉偶联反应中。在这里,我们描述了在无金属催化剂的条件下炔烃双官能化的氧化偶联方法。有效的方案直接提供了多种β-酮二硫醚,具有良好的收率和极高的区域选择性。它提供了通过自由基偶联途径可控地形成新的C–C键和C–O键来获得有价值的二硫杂环戊烷的一般途径。