作者:Matthew Clarke、Ian Carpenter
DOI:10.1055/s-0030-1259080
日期:2011.1
Enantioselective transfer hydrogenation of benzofuranyl aryl ketones proceeds with moderate to good enantioselectivity even when the aryl group is not sterically differentiated by ortho-substituents. The best results are obtained with substrates that are functionalised by electron-withdrawing aryl groups that contrast with the electron-rich benzofuran, which is consistent with [Ru― ArC―H]·Ar π interactions
苯并呋喃基芳基酮的对映选择性转移氢化以中等至良好的对映选择性进行,即使芳基没有通过邻位取代基进行空间区分。最好的结果是使用通过吸电子芳基官能化的底物获得的,这与富电子苯并呋喃形成对比,这与 [Ru-ArC-H]·Ar π 相互作用作为控制元素一致。无论电子效应如何,对映选择性压力氢化都会产生较低的对映选择性,除非芳基是邻位取代的,在这种情况下,可以实现高达 86% 的 ee。