SimplePhos ligands proved to be very powerful ligands in the generation of quaternary stereogenic centers by Michael addition of alkenyl-aluminum reagents to cyclic enones. Using commercially available and easily accessible alkenylbromides as alane precursors the present procedure offers a facile access to β-alkenyl-substituted cyclohexanones with high enantioselectivities up to 96%.
SimplePhos
配体被证明是非常强大的
配体,可以通过将烯基铝试剂迈克尔加成到环烯酮上来生成四元立体中心。使用可商购且易于获得的烯基
溴化物作为铝烷前体,本程序提供了获得具有高达 96% 高对映选择性的 β-烯基取代的
环己酮的便捷途径。