A series of substrates containing a vinylic bromide were employed in a copper-free methodology using bidendate NHC ligands. The desired compounds are generally obtained with good enantioselectivity and good regioselectivity. Importantly the copper-catalyzed system afforded a lower enantioselectivity value. The catalytic products could be transformed into a broad scope of new 1,1-disubstituted olefins
使用二齿NHC
配体,在无
铜方法中使用了一系列含
乙烯基溴的底物。通常以良好的对映选择性和良好的区域选择性获得所需化合物。重要的是,
铜催化的体系提供了较低的对映选择性值。催化产物可以在一步转化中转化为多种新的1,1-二取代烯烃,而又不损害对映选择性。