On the Reduction of <i>S</i>-Alkyl-thionocarbonates (Xanthates) with Phosphorus Compounds
作者:Jean Boivin、Rafik Jrad、Stéphanie Juge、Van Tai Nguyen
DOI:10.1021/ol0342610
日期:2003.5.1
[reaction: see text] Reductive cleavage of the carbon-sulfur bond present in S-alkyl-thionocarbonates (xanthates) was achieved by high-yielding, tin-free radical reactions based on phosphorus reagents. The combination hypophosphorous acid/triethylamine/AIBN led to fast, efficient, and smooth formation of the alkane. Reduction with diethyl phosphite was sufficiently slow to permit sequential intermolecular
[反应:见正文]通过基于磷试剂的高产率锡自由基反应可实现S-烷基-硫代碳酸酯(黄原酸酯)中存在的碳-硫键的还原裂解。次磷酸/三乙胺/ AIBN的组合可导致快速,有效和顺畅地形成烷烃。用亚磷酸二乙酯的还原足够缓慢,以允许将2-氧代烷基黄原酸酯顺序地分子间加成到烯烃上,然后裂解新形成的碳-硫键。