Synthesis 2006(12): 2053-2063  
DOI: 10.1055/s-2006-942372
PAPER
© Georg Thieme Verlag Stuttgart · New York

A Concise Synthesis of Pyrrolo- and Pyrrolidino[1,2-a]quinolin-1-ones via Diels-Alder Reactions of N-Acyliminium Cations with Olefins

Wei Zhang*, Limin Huang, Junpu Wang
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. of China
Fax: +86(931)8625657; e-Mail: zhangwei6275@lzu.edu.cn;
Further Information

Publication History

Received 12 December 2005
Publication Date:
05 May 2006 (online)

Abstract

A concise and efficient synthesis of pyrrolo- and pyrrolidino[1,2-a]quinolin-1-ones has been developed. New members of this family can thus be generated via Diels-Alder reactions of olefins with N-acyliminium cations produced, in the presence of BF3·Et2O, from 5-hydroxy-1-arylpyrrol-2-ones and 5-hydroxy-1-arylpyrrolidin-2-ones in moderate to high yields at ambient temperature.