Organic Chemistry International
Volume 2012 (2012), Article ID 153159, 5 pages
Research Article

CES as an Efficient Natural Catalyst for Synthesis of Schiff Bases under Solvent-Free Conditions: An Innovative Green Approach

Organic Research Laboratory, Department of Chemistry, Padmabhushan Dr. Vasantraodada Patil College, Sangli District, Tasgaon 416312, India

Received 3 September 2012; Revised 16 November 2012; Accepted 18 November 2012

Academic Editor: William Setzer

Copyright © 2012 Suresh Patil 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.


A mild and efficient method has been reported for the preparation of Schiff base ligands through the condensation reaction of various aromatic aldehydes with substituted aromatic amines in the presence of CES (calcined eggshell) as a heterogeneous catalyst under solvent-free conditions. The advantages of this ecofriendly, economic method are simplicity of the reaction procedure, moderate to good product yields, and very short reaction times.