For the enantioselective borohydride reduction of carbonyl compounds catalyzed by the optically active ketoiminatocobalt complexes, chloroform has been employed as a unique solvent for achieving a high enantioselectivity, whereas it was found that a catalytic amount of chloroform effectively activated the present catalytic system to convert various ketones into the corresponding reduced product with a high ee in the THF solvent.
对于由光学活性酮
亚胺钴配合物催化的羰基化合物对映选择性
硼氢化还原,
氯仿已被用作一种独特的溶剂,以实现高对映选择性,然而发现催化量的
氯仿有效地活化了当前的催化体系,在THF溶剂中将各种酮转化为相应的还原产物,并具有高对映体过量。