Synthesis 2007(20): 3191-3194  
DOI: 10.1055/s-2007-983899
PAPER
© Georg Thieme Verlag Stuttgart · New York

Iodine as a Mild, Efficient, and Cost-Effective Reagent for the Synthesis of cis-1-Oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylic Acids

J. S. Yadav*, B. V. Subba Reddy, A. Ramesh Reddy, A. V. Narsaiah
Division of Organic Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India
Fax: +91(40)27160512; e-Mail: yadavpub@iict.res.in;
Further Information

Publication History

Received 23 April 2007
Publication Date:
11 September 2007 (online)

Abstract

Arylimines generated in situ from aromatic aldehydes and anilines undergo smooth coupling with homophthalic anhydride in the presence of 10 mol% of molecular iodine under mild and neutral conditions to afford the corresponding cis-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylic acids in excellent yields with high cis selectivity. The use of iodine makes this procedure simple, convenient, and cost-effective.