Abstract
Sulfonamides were converted to the corresponding N‐acyl sulfonamides with carboxylic acid chlorides and anhydrides in the presence of silica chloride. All reactions were performed in both heterogeneous and solvent‐free conditions. This method provides the N‐acyl sulfonamides products in good to high yield and purity.
Acknowledgment
We thank Dr. Taki for his kind help and also Islamic Azad University of Shahreza Research Council for partial support.