摘要:
Asymmetric conjugated addition of allylcopper reagents derived from an ally! Grignard reagent and CuBr center dot Me2S to chiral alpha,beta-unsaturated N-acyl oxazolidinones has been achieved. The synthetic procedure was applied to the preparation of the key intermediate of the novel nonbenzodiazepine hypnotic drug, ramelteon. (C) 2010 Wei Lu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.