An Efficient Diphosphine/Hybrid-Amine Combination for Ruthenium(II)-Catalyzed Asymmetric Hydrogenation of Aryl Ketones
作者:Yuehui Li、Yougui Zhou、Qixun Shi、Kuiling Ding、Ryoji Noyori、Christian A. Sandoval
DOI:10.1002/adsc.201000577
日期:2011.2.11
1H-benzimidazole-2-methanamine (BIMA) ligands in combination with 2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis(diphenylphosphino)butane (DIOP) afford efficient catalytic systems for the ruthenium(II)-catalyzed asymmetric hydrogenation (AH) of a number of aryl ketones. The AH proceeds smoothly with substrate-to-catalyst (S/C) molar ratios of up to 100,000 (TOF of 6500 h−1, 8 atm) giving chiral alcohols in up
现成的基于模块化胺/苯并咪唑的1 H-苯并咪唑-2-甲胺(BIMA)配体与2,3- O-异亚丙基-2,3-二羟基-1,4-双(二苯基膦基)丁烷(DIOP)组合)为钌(II)催化的许多芳基酮的不对称氢化(AH)提供了有效的催化体系。AH顺利进行,底物与催化剂(S / C)的摩尔比最高为100,000(TOF为6500 h -1,8 atm),手性醇含量高达99%ee。