Stereoconservative Formation and Reactivity of α-Chalcogen-Functionalized Vinyllithium Compounds from α-Bromo-vinylic Chalcogenides
作者:Antonio Braga、Gilson Zeni、Leandro de Andrade、Claudio Silveira
DOI:10.1055/s-1997-3227
日期:1997.5
Bromine/lithium exchange was performed upon treatment of α-bromo-vinylic chalcogenides with butyllithium in hexane at room temperature to provide α-chalcogen-vinyllithium intermediates quantitatively. Addition of electrophiles to the lithiated compounds gave the corresponding functionalized vinylic chalcogenides in good yields with retention of configuration.
在室温下,将α-
溴代
乙烯类
硫属化合物与
正丁基锂在己烷中反应,进行
溴锂交换,以定量提供α-
硫属元素-
乙烯基锂中间体。向
锂化的化合物中加入亲电子试剂,可得到相应功能化的
乙烯基硫属化合物,收率良好,并保持构型不变。