γ-functionalization of the γ-lactone framework in the corresponding 5-alkylidenefuran-2(5H)-ones is reported. The developed approach is based on a stereocontrolled cascade reaction with 2-mercaptocarbonyl compounds proceeding in a sequence of thia-Michael/aldol/oxa-Michael reactions. Such a synthetic strategy allows for a construction of a unique polycyclic architecture containing γ-lactone, tetrahydrofuran, and
报道了在相应的5-亚烷基
呋喃-2(5 H)-ones中γ-内酯骨架直接α,β,γ-官能化的新策略。所开发的方法是基于与2-巯基羰基化合物的立体控制级联反应,该反应按一系列的
硫-迈克尔/醛醇/氧杂-迈克尔反应进行。这种合成策略允许构建包含γ-内酯,
四氢呋喃和
四氢噻吩环系统的独特多环结构。在衍生自
金鸡纳
生物碱的双功能催化剂的存在下,已获得优异的对映选择性和非对映选择性。