A new straightforward methodology to prepare polyfunctionalised enantiopure pyrrolizidine systems, based on the 1,3-dipolar cycloaddition of 2-azetidinone-tethered azomethine ylides as the key reaction, is presented.
1,3-Dipolar cycloaddition of 2-azetidinone-tethered azomethine ylides. Application to the rapid, stereocontrolled synthesis of optically pure highly functionalised pyrrolizidine systems
B. Alcaide, P. Almendros, J. M. Alonso and M. F. Aly, Chem. Commun., 2000, 485 DOI: 10.1039/B000249F
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