Unusual mode of reactivity of 2-alkylidene-4-oxothiazolidine S-oxides under the Pummerer reaction conditions
作者:Zdravko Džambaski、Đorđe Toljić、Bojan Bondžić、Rade Marković、Marija Baranac-Stojanović
DOI:10.1016/j.tet.2013.09.004
日期:2013.11
The reactivity of 2-alkylidene-4-oxothiazolidine S-oxides under the Pummerer reaction conditions, using Ac2O, TFAA, SOCl2 and SOBr2 as initiators, has been examined. Almost all reactions proceeded with absolute regioselectivity yielding α-substituted sulfides or vinyl-chloro derivatives. The mechanism for the formation of the latter products was postulated and proved experimentally.
2-亚烷基-4-氧代噻唑的反应性小号-oxides的Pummerer重反应条件下,使用AC,2 O,TFAA,的SOCl 2和SOBR 2作为引发剂,已审查。几乎所有反应都以绝对区域选择性进行,得到α-取代的硫化物或乙烯基-氯衍生物。对于后者产物的形成机理推测和实验证明。