Abstract
An efficient method for the synthesis of fused pyran derivatives has been developed by a one-pot, three-component, solvent-free reaction of 1H-pyrazole-4-carbaldehyde and various active methylenes and malononitriles under microwave irradiation in the presence of pyrrolidine-acetic acid as bifunctional catalyst. The salient features of this protocol are the solvent-free reaction, shorter reaction time, greater selectivity, and straightforward workup procedure. All the synthesized compounds were confirmed by analytical and spectral data. The synthesized compounds were investigated against a representative panel of pathogenic strains using the broth microdilution MIC method for their in vitro antimicrobial activity.
Published Version
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