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2-Benzoylamino- N -phenyl-benzamide derivatives ( 5a - h ) were prepared from 2-phenyl-3,1-(4 H )-benzoxazin-4-one 3 and substituted anilines 4a - h in the presence of a Keggin-type heteropolyacids series (H₃PW 12 O 40 ·13H₂O; H₄SiW 12 O 40 ·13H₂O; H₄SiMo 12 O 40 ·13H₂O; and H₃PMo 12 O 40 ·13H₂O) as catalysts without solvent and under microwave irradiation. We found that the use of H₃PW 12 O 40 ·13H₂O acid coupled to microwave irradiation allowed obtaining a high-yielding reaction with a short time. The compound structures were established by ¹H-NMR and 13 C-NMR. The antibacterial and antifungal activities of the synthesized compounds exhibited an inhibition of the growth of bacteria and fungi.

molecules/molecules online/molecules annual

Recyclable Keggin Heteropolyacids as an Environmentally Benign Catalyst for the Synthesis of New 2-Benzoylamino-N-phenyl-benzamide Derivatives under Microwave Irradiations at Solvent-Free Conditions and the Evaluation of Biological Activity