Catalytic asymmetric synthesis of 2,5-dihydrofurans using synergistic bifunctional Ag catalysis
作者:Taoda Shi、Shenghan Teng、Alavala Gopi Krishna Reddy、Xin Guo、Yueteng Zhang、Kohlson T. Moore、Thomas Buckley、Damian J. Mason、Wei Wang、Eli Chapman、Wenhao Hu
DOI:10.1039/c9ob01903k
日期:——
report a bifunctional Ag catalyst promoted intramolecular capture of oxonium ylides with alkynes for the enantioselective synthesis of 2,5-dihydrofurans. This represents unprecedented synergistic catalysis of a bifunctional Ag catalyst. Mechanistic studies revealed that [(R)-3,5-DM-BINAP](AgSbF6)2 (9) is likely to be the active catalytic species and that the reaction involves second order kinetics with
我们报告了一种双功能Ag催化剂促进炔烃与2,5-二氢呋喃的对映选择性合成分子内的氧鎓叶立德捕获。这代表了双官能Ag催化剂的空前的协同催化。机理研究表明,[(R)-3,5-DM-BINAP](AgSbF6)2(9)可能是活性催化物质,该反应涉及9的二级动力学,表明存在两个图9涉及与Ag活化的炔烃的Ag相关的氧鎓叶立德的分子内捕集。基于我们的机理假说,我们进一步优化了反应,以高化学和对映选择性的方式,以高收率至优异收率,提供了一种简便的方法来处理2,5-二氢呋喃。