作者:Meng-Yang Chang、Chun-Li Pai、Yung-Hua Kung
DOI:10.1016/j.tetlet.2005.12.008
日期:2006.2
We present an easy and straightforward synthesis of 3-arylpyrrolines 4a-g by repeated treatment of 4-aryl-1,2,5,6-tetrahydropyridines 2a-g with in-chloroperoxybenzoic acid (MCPBA) and boron trifluoride etherate (BF3-OEt2). The transformation proceeds via epoxidation, ring contraction, Baeyer-Villiger oxidation and elimination reaction and affords 3-arylpyrrolines 4a-g with 61-70% yield. This facile strategy was also used to synthesize racemic baclofen (6). (c) 2005 Elsevier Ltd. All rights reserved.