Microwave Assisted Synthesis of Novel Imidazolopyridinyl Indoles as Potent Antioxidant and Antimicrobial Agents

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We describe herein the design, synthesis, and pharmacological evaluation of novel series of imidazolopyridinyl indole analogues as potent antioxidants and antimicrobials. These novel compounds (3a–i) were synthesized by reacting 3,5-disubstituted-indole-2-carboxylic acid (1a–i) with 2,3-diamino pyridine (2) in excellent yield. The novel products were confirmed by their IR,1H NMR,13C NMR, mass spectral, and analytical data. These compounds were screened for their antioxidant and antimicrobial activities. Among the compounds tested,3a–dshowed the highest total antioxidant capacity, scavenging, and antimicrobial activities. Compounds3c-dand3g-hhave shown excellent ferric reducing activity.