A new simple route for the synthesis of (±)-2-azetidinones starting from β-enaminoketoesters
作者:Carmela De Risi、Gian Piero Pollini、Augusto C Veronese、Valerio Bertolasi
DOI:10.1016/s0040-4020(01)01036-5
日期:2001.12
beta -Enaminoketoesters 1, obtained through metal-catalysed reaction of methyl acetoacetate with alkyl cyanoformates have been conveniently transformed into beta -aminoesters 4, 5 by reduction of both the carbonyl group and the carbon-carbon double bond of the enaminoester moiety. These intermediates could be easily converted to (+/-)-2-azetidinones 6, 7 structurally related to thienamycin in good yield and high diastereoselectivity. (C) 2001 Elsevier Science Ltd. All rights reserved.