(R)-[1-(1H-Benzimidazol-2-yl)ethyl]carbamic acid phenylmethyl ester 在
钯(r)-(9ci)-alpha-甲基-1H-苯并咪唑-2-甲胺 作用下,
以
甲醇 为溶剂,
以to give 0.48 g of the desired product的产率得到(r)-(9ci)-alpha-甲基-1H-苯并咪唑-2-甲胺
(R)-[1-(1H-Benzimidazol-2-yl)ethyl]carbamic acid phenylmethyl ester 在
钯(r)-(9ci)-alpha-甲基-1H-苯并咪唑-2-甲胺 作用下,
以
甲醇 为溶剂,
以to give 0.48 g of the desired product的产率得到(r)-(9ci)-alpha-甲基-1H-苯并咪唑-2-甲胺
The efficient chemical synthesis and enzymatic kineticresolution of a family of 1-(heteroaryl)ethanamines have been performed with lipases responsible for the preparation of nitrogenated compounds in high optical purity. Thus, Candida antarctica lipase type B has been identified as an excellent biocatalyst for the stereoselective production of the corresponding enantiomerically enriched (R)-acetamides
Hybrid NH<sub>2</sub>-Benzimidazole Ligands for Efficient Ru-Catalyzed Asymmetric Hydrogenation of Aryl Ketones
作者:Yuehui Li、Kuiling Ding、Christian A. Sandoval
DOI:10.1021/ol802766u
日期:2009.2.19
Readily available hybrid NH2/benzimidazole ligands (R-bimaH, 1) dramatically influence the outcome of established Ru-based catalysts during asymmetric hydrogenation of aryl ketones. The benzimidazole functionality results in reversal of the typically observed chiral induction and allows for hydrogenation to be uncharacteristically conducted in nonprotic solvents. The developed systems efficiently catalyzed the AH of a number of ketones in up to 99% ee.