作者:Mahavir Prashad、Yugang Liu、Hong-Yong Kim、Oljan Repic、Thomas J Blacklock
DOI:10.1016/s0957-4166(99)00384-5
日期:1999.9
A new approach towards the enantioselective synthesis of (2S,2'R)-erythro-methylphenidate (1) is described. The key step in the synthesis utilizes Evans' 4-substituted-2-oxazolidinone chiral auxiliary to control the diastereofacial selectivity in the hydrogenation of enamine intermediate 6, yielding the hydrogenated product 7 with excellent diastereoselectivity. Methanolysis of 7 afforded 1 with excellent enantiopurity. (C) 1999 Elsevier Science Ltd. All rights reserved.