PAPER	Synthesis 2006: 2767-2771   DOI: 10.1055/s-2006-942474
© Georg Thieme Verlag Stuttgart · New York
Perchloric Acid Adsorbed on Silica Gel (HClO4-SiO2) as an Extremely Efficient and Reusable Catalyst for 1,3-Dithiolane/Dithiane Formation
Santosh Rudrawar, Ram C. Besra, Asit K. Chakraborti*
National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S. Nagar, Punjab 160062, India Fax: +91(172)2214692; e-Mail: akchakraborti@niper.ac.in;
Received 28 March 2006

Abstract

Perchloric acid adsorbed on silica gel (HClO₄-SiO₂) has been found to be an extremely efficient and reusable catalyst for 1,3-dithiolane and 1,3-dithiane formation under solvent-free conditions at room temperature.

Keywords

HClO₄-SiO₂ - catalyst - dithiolanes - dithianes - solvent-free