作者: Léon Ghosez , Jacqueline Marchand-Brynaert
DOI: 10.1016/B978-0-08-052349-1.00121-9
关键词: Ynolate 、 Ketene 、 Stereochemistry 、 Imine 、 Cycloaddition 、 Staudinger reaction 、 Computational chemistry 、 Enantioselective synthesis 、 Chemistry
摘要: This review focuses on new developments in [2 þ 2] cycloadditions leading to four-membered heterocycles (b-lactams, b-lactones, b-sultams, azetidines, etc.) which appeared between 1992 and 2011. A special attention is drawn the mechanistic aspects of reactions their consequences stereochemical outcome cycloaddition processes. Accordingly, subdivision sections reflects this point view: entries are related various reagents (ketenes, enolates, ynolates, isocyanates, with CQX bonds instead a list types heterocycles. The accent also put asymmetric catalysis, particular interest for enantioselective synthesis biologically active compounds or precursors.