Starting from (R)-camphordiamine, 13 new camphor-annulated imidazoline ligands are synthesized in good yields as two regioisomeric series. Yields of up to 94% and good enantioselectivities up to 67% are achieved for the copper(II)-catalyzed Henry reaction giving the product stereoselectively according to the regioisomer used.
从(R)-
樟脑二胺开始,以两个区域异构体系列的高收率合成了13种新的
樟脑环化的
咪唑啉配体。对于
铜(II)催化的亨利反应,根据所使用的区域异构体,立体选择性地产生产物,获得高达94%的产率和高达67%的良好对映选择性。