The first asymmetric Cu-catalyzed conjugate addition of dialkylzinc zinc reagents to a large scope of enals in presence of phosphoramidite, SimplePhos, or (R)-BINAP ligands with enantiomeric excesses up to 90% is reported. Moreover, ACA of Grignard reagents afforded moderate to good 1,4-regioselectivities with enantioselectivities up to 90%.
据报道,在亚
磷酰胺,SimplePhos或(R)-BINAP
配体的存在下,对映体过量最高达90%,二烷基
锌锌试剂第一次向大范围的烯类中进行了不对称的Cu催化的共轭加成反应。此外,
格氏试剂的ACA提供中等至良好的1,4-区域选择性,对映选择性高达90%。