A new cost-effective Ru-chloramphenicol base derivative catalyst for the asymmetric transfer hydrogenation/dynamic kinetic resolution of N-Boc α-amino-β-ketoesters and its application to the synthesis of the chiral core of vancomycin
Herein we describe the application of a series of newly developed Ru-chloramphenicol base derivative complexes as catalysts for the highly diastereo- and enantioselective transferhydrogenation of N-Boc α-amino-β-ketoesters for the asymmetricsynthesis of anti-N-Boc-β-hydroxy-α-amino esters. This report highlights the utility of this catalytic methodology for the preparation of pharmaceutical compounds
Highly enantioselective synthesis of anti aryl β-hydroxy α-amino esters via DKR transfer hydrogenation
作者:Zhuqing Liu、C.Scott Shultz、Candice A. Sherwood、Shane Krska、Peter G. Dormer、Richard Desmond、Claire Lee、Edward C. Sherer、Joseph Shpungin、James Cuff、Feng Xu
DOI:10.1016/j.tetlet.2011.01.146
日期:2011.4
aryl β-hydroxy α-amino esters via dynamic kineticresolution (DKR), asymmetric transfer hydrogenation of α-amino β-keto esters is described. The anti β-hydroxyl α-amino esters were obtained both in high yields and high diasteroselectivity. The observed high anti selectivity is inconsistent with the previous results in literature. The absolute stereochemistry of the aryl β-hydroxy α-amino esters was