Table of Contents
Journal of Catalysts
Volume 2013, Article ID 723903, 7 pages
http://dx.doi.org/10.1155/2013/723903
Research Article

Regioselective Thiocyanation of Aromatic and Heteroaromatic Compounds Using [2-(Sulfooxy)ethyl]sulfamic Acid as an Efficient, Recyclable Organocatalyst and Novel Difunctional Brønsted Acid

1Department of Chemistry, Payame Noor University, P.O. Box 19395-4697, Tehran, Iran
2Department of Chemistry, Faculty of Sciences, Islamic Azad University, Ilam Branch, Ilam, Iran

Received 14 August 2013; Accepted 16 October 2013

Academic Editor: Mohammed M. Bettahar

Copyright © 2013 Sami Sajjadifar et al. 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

A green and simple procedure for the thiocyanation of aromatic and heteroaromatic compounds is described. [2-(Sulfooxy)ethyl]sulfamic acid (SESA) (supported on silica) is easily produced by addition of chlorosulfonic acid to 2-aminoethanol and this catalyst is applied as an efficient, reusable, and heterogeneous catalyst for the thiocyanation of heterocycles, substituted anilines (electron-rich and electron-deficient), and N,N-disubstituted aromatic amines using hydrogen peroxide in the water : ethanol as a solvent at room temperature. The catalyst can be easily recovered and reused for five reaction cycles without considerable loss of activity.