Asymmetric Synthesis of <i>cis</i>-2,5-Disubstituted Pyrrolidine, the Core Scaffold of β<sub>3</sub>-AR Agonists
作者:Feng Xu、John Y. L. Chung、Jeffery C. Moore、Zhuqing Liu、Naoki Yoshikawa、R. Scott Hoerrner、Jaemoon Lee、Maksim Royzen、Ed Cleator、Andrew G. Gibson、Robert Dunn、Kevin M. Maloney、Mahbub Alam、Adrian Goodyear、Joseph Lynch、Nobuyashi Yasuda、Paul N. Devine
DOI:10.1021/ol400252p
日期:2013.3.15
practical, enantioselective synthesis of cis-2,5-disubstituted pyrrolidine is described. Application of an enzymatic DKR reduction of a keto ester, which is easily accessed through a novel intramolecular N→C benzoylmigration, yields syn-1,2-amino alcohol in >99% ee and >99:1 dr. Subsequent hydrogenation of cyclic imine affords the cis-pyrrolidine in high diastereoselectivity. By integrating biotechnology