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Paper | Special issue | Vol 30, No. 1, 1990, pp.501-505
Published online, 1st January, 1970
DOI: 10.3987/COM-89-S27
N-Acyliminium Cyclizations: Formation of the Furo[3,4-a]pyrrolizine Ring System

Hugo Ent, Henk de Koning, and W. Nico Speckamp*

*Organic Chemistry Department, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands

Abstract

The hydroxylactams 5a,b could be converted into the furo[3,4-a]pyrrolizine derivatives 10a,b via the 2-aza-Cope rearrangement cyclization of N-acyliminium ions.