Synthesis 2014; 46(01): 73-80
DOI: 10.1055/s-0033-1340082
paper
© Georg Thieme Verlag Stuttgart · New York

Ammonium Chloride-Catalyzed Three-Component Reaction for the Synthesis of Fused 4H-Chromene Derivatives in Aqueous Medium

Suchandra Bhattacharjee
Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, India   Fax: +91(361)2582349   Email: atk@iitg.ernet.in
,
Deb K. Das
Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, India   Fax: +91(361)2582349   Email: atk@iitg.ernet.in
,
Abu T. Khan*
Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, India   Fax: +91(361)2582349   Email: atk@iitg.ernet.in
› Author Affiliations
Further Information

Publication History

Received: 17 July 2013

Accepted after revision: 10 October 2013

Publication Date:
07 November 2013 (online)


This work is dedicated to Professor Gautam Barua, former Director of the Indian Institute of Technology, Guwahati for his immense contribution­ in setting up and developing the Science Department of IIT Guwahati.

Abstract

An efficient one-pot process was developed to synthesize 4H-chromene derivatives using a three-component reaction involving salicylaldehydes, cyclic 1,3-diketones, and thiols in an aqueous medium at room temperature. This protocol was accomplished using the inexpensive and readily available catalyst NH4Cl. The attractive features of this protocol are: use of inexpensive catalyst NH4Cl, good yields, and mild and environmentally benign reaction conditions.

Supporting Information