Sulphamic Acid - An Efficient and Cost-Effective Solid Acid Catalyst for the Pechmann Reaction

Abstract

Sulphamic acid (H2NSO3H, SA) is used as an alternative to conventional acid catalysts in the Pechmann condensation of phenols with β-ketoester leading to the formation of substituted coumarin. The method is simple, cost-effective, solvent-free and gives good yields in a short reaction time.