An operationally simple approach to (E)-α-halo vinyl sulfides and their applications for accessing stereodefined trisubstituted alkenes
作者:Zhaozhen Yang、Xiaoyi Chen、Wei Kong、Siyuan Xia、Renwei Zheng、Fang Luo、Gangguo Zhu
DOI:10.1039/c3ob27307e
日期:——
protocol for the synthesis of (E)-α-halo vinyl sulfides has been achieved via a highly regio- and stereoselective hydrohalogenation of alkynyl thioethers using lithium halides in HOAc or propionic acid at room temperature. It permits the formation of (E)-α-chloro and (E)-α-bromo vinyl sulfides in satisfactory yields with good to excellent stereoselectivities. Moreover, this work results in a new method for
通过使用卤化锂在HOAc或HCl中的炔基硫醚的高度区域选择性和立体选择性加氢卤化作用,已经实现了用于合成(E)-α-卤代乙烯基硫化物的操作简单实用的方案。丙酸在室温下。它允许以令人满意的产率以及良好至优异的立体选择性形成(E)-α-氯和(E)-α-溴乙烯基硫化物。而且,这项工作导致了一种新的组装立体定义的(E)-或(Z)-三取代烯烃的新方法,该方法的特征是首先结合了(E)-α-卤代乙烯基硫化物的C-X键-格氏试剂对C–S键的催化偶联。