Synthesis 2022(14): 2381-2385  
DOI: 10.1055/s-2004-831185
PAPER
© Georg Thieme Verlag Stuttgart · New York

Silver Phosphotungstate: A Novel and Recyclable Heteropoly Acid for Friedländer Quinoline Synthesis

J. S. Yadav*, B. V. S. Reddy, P. Sreedhar, R. Srinivasa Rao, K. Nagaiah
Division of Organic Chemistry, Indian Institute of Chemical Technology, Hyderabad-500 007, India
Fax: +91(40)27160512; e-Mail: yadav@iict.res.in;
Further Information

Publication History

Received 26 March 2004
Publication Date:
19 August 2004 (online)

Abstract

o-Aminoaryl ketones undergo smooth condensation with α-methylene ketones on the surface of silver heteropoly acid (Ag3PW12O40) under mild reaction conditions to afford the corresponding polysubstituted quinolines in excellent yields with high selectivity. The catalyst can be recovered by simple filtration and can be recycled in subsequent reactions.