A binary catalyst system of [RuCl2(η6-arene)]2 and a protic aminothiol (SN) ligand has been found to promote hydrogen transfer between alcohols and carbonyl compounds. The chiral catalyst system with the pipecolinol-derived chiral SN ligand displays excellent stereoselectivity in the asymmetric transfer hydrogenation of aromatic ketones using HCO2H-Et3N. Novel unsymmetrical bis(thiolate)-bridged binuclear complex, which is relevant to the generation of catalytically active species, has been synthesized and structurally characterized.
发现了一种二元催化剂体系,由 [RuCl2(η6-
芳烃)]2 和质子性
氨基
硫醇 (SN)
配体组成,能够促进醇和羰基化合物之间的氢转移。使用 HCO2H-Et3N 的具有
哌啶醇衍生的手性 SN
配体的二元催化剂体系在对
芳香酮的不对称转移氢化中显示出优异的立体选择性。合成并结构表征了一种新型非对称双
硫醇盐桥连的双核配合物,该配合物与催化活性物种的生成相关。