Facile synthesis and antimicrobial activity of a novel series of 7,8-dihydro-2-(2-oxo-2H-chromen-3-yl)-5-aryl-cyclopenta[b]pyrano-pyrimidine-4,6-5H-dione derivatives catalyzed by reusable silica-bonded N-propyl diethylenetriamine sulfamic acid

An efficient method for the synthesis of a novel series of cyclopenta[b]pyrano pyrimidinone derivatives with silica-bonded N-propyl diethylenetriamine sulfamic acid (SBPDSA) as catalyst has been achieved by the condensation of 2-amino-4-phenyl-5-oxo-4,5,6,7-tetrahydrocyclopenta[b]pyran-3-carbonitrile derivatives and coumarin-3-carboxylic acid under solvent free conditions. Antimicrobial studies showed all the target compounds processing good antibacterial and antifungal activities.