A new simple route for the synthesis of (±)-2-azetidinones starting from β-enaminoketoesters
摘要:
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.
A new simple route for the synthesis of (±)-2-azetidinones starting from β-Enaminoketoesters
摘要:
beta-Enaminoketoesters, obtained by metal-catalyzed reaction between alkyl acetoacetates and alkyl cyanoformates, are useful starting materials for rapid access to beta-acetyl-dehydroaspartic acrid derivatives which could be transformed into (+/-)-2-azetidinones bearing a 1-hydroxy-ethyl substituent through suitable reductive processes. (C) 1999 Elsevier Science Ltd. All rights reserved.
A new simple route for the synthesis of (±)-2-azetidinones starting from β-Enaminoketoesters
作者:Carmela De Risi、Gian P. Pollini、Augusto C. Veronese、Valerio Bertolasi
DOI:10.1016/s0040-4039(99)01421-5
日期:1999.9
beta-Enaminoketoesters, obtained by metal-catalyzed reaction between alkyl acetoacetates and alkyl cyanoformates, are useful starting materials for rapid access to beta-acetyl-dehydroaspartic acrid derivatives which could be transformed into (+/-)-2-azetidinones bearing a 1-hydroxy-ethyl substituent through suitable reductive processes. (C) 1999 Elsevier Science Ltd. All rights reserved.
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.