Metal-assisted synthesis of enantiopure spirocyclic β-lactams from azetidine-2,3-diones
作者:Benito Alcaide、Pedro Almendros、Teresa Martı́nez-del Campo、Raquel Rodrı́guez-Acebes
DOI:10.1016/j.tetlet.2004.06.130
日期:2004.8
A novel approach to enantiopure spirocyclic beta-lactams has been developed by using different intramolecular metal-catalyzed cyclization reactions in monocyclic unsaturated alcohols. The access to cyclization precursors, 2-azetidinone-tethered homoallylic alcohols, (buta-1,3-dien2-yl)methanols, and alpha-allenols was achieved by regio and stereoselective addition of stabilized organo-indium reagents to azetidine-2,3-diones in aqueous environment. (C) 2004 Elsevier Ltd. All rights reserved.