Stereospecific Alkyl and Alkynyl Substitution Reactions of Epoxy Sulfides with Organoaluminums with Double Inversion of the Configuration
作者:Minoru Sasaki、Keiji Tanino、Masaaki Miyashita
DOI:10.1021/jo010240c
日期:2001.8.1
A regioselective and stereospecific substitution reaction of 1-(phenylthio)-2,3-epoxyalkanes was achieved by using organoaluminum reagents as a nucleophile. Under the influence of trimethyl- or triethylaluminum, a 1-(phenylthio)-2,3-epoxyalkane underwent substitution at the C2 position to give a product with retention of the configuration. The reaction proceeds through an episulfonium ion intermediate
通过使用有机铝试剂作为亲核试剂,实现了1-(苯硫基)-2,3-环氧烷烃的区域选择性和立体选择性取代反应。在三甲基铝或三乙基铝的影响下,在C2位置对1-(苯硫基)-2,3-环氧烷烃进行取代,得到保留构型的产物。该反应通过epi磺酸盐离子中间体进行,生成中间体构型两次反转的C2-取代产物。还通过与二甲基[2-(三甲基甲硅烷基)乙炔基]铝在二氯甲烷中反应来完成炔基的引入。