Tetrahedron Letters

Direct cyclization of ortho-(1H-pyrrol-1-yl) aryl and heteroaryl carboxylic acids into fused pyrrolizinones

F Aiello, A Garofalo, F Grande

Index: Aiello, Francesca; Garofalo, Antonio; Grande, Fedora Tetrahedron Letters, 2010 , vol. 51, # 50 p. 6635 - 6636

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Citation Number: 11

Abstract

A series of fused heterocyclic compounds based on a pyrrolizinone structure have been prepared from ortho-(1H-pyrrol-1-yl) aryl and heteroaryl carboxylic acids by intramolecular Friedel–Crafts acylation promoted by bis (trichloromethyl) carbonate, in generally good yield without using Lewis acid catalysts.