Table of Contents
ISRN Organic Chemistry
Volume 2013 (2013), Article ID 132794, 5 pages
http://dx.doi.org/10.1155/2013/132794
Research Article

Silica-ZnCl2: An Efficient Catalyst for the Synthesis of 4-Methylcoumarins

Department of Studies in Chemistry, Central College Campus, Bangalore University, Bengaluru 560001, India

Received 23 September 2013; Accepted 16 October 2013

Academic Editors: L. De Luca, T. C. Dinadayalane, and W. Xia

Copyright © 2013 Bandita Datta and Mohamed Afzal Pasha. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Silica-ZnCl2 has been found to be an efficient and eco-friendly catalyst for the synthesis of substituted 4-methylcoumarins from ethyl acetoacetate and substituted phenols under “neat” conditions in an oil bath at 80°C. The experimental procedure is simple, includes shorter reaction times (15–65 min), compatible with sensitive functional groups, and results in excellent yield of the products.