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Updated: Mar 12, 2026

A Direct, Early Stage Guanidinylation Protocol for the Synthesis of Complex Aminoguanidine-containing Natural Products
Published on: September 9, 2016
Synthesis and biological evaluation of chalcone derivatives containing aminoguanidine or acylhydrazone moieties
Zhi-Yu Wei1, Ke-Qiang Chi2, Zhan-Kui Yu1
1Key Laboratory of Natural Resources and Functional Molecules of the Changbai Mountain, Affiliated Ministry of Education, Yanbian University College of Pharmacy, Yanji, Jilin Province 133002, PR China.
Abstract:
Three novel series of chalcone derivatives containing an aminoguanidine or acylhydrazone moiety were designed, synthesized and evaluated in terms of their antibacterial, antifungal and anti-inflammatory activities. Most of the synthesized compounds showed potent inhibitory activity towards various bacteria and one fungus with minimum inhibitory concentrations (MICs) ranging from 1 to 8μg/mL. Compared with our previously reported chalcone derivatives (MICs >64μg/mL), these compounds exhibited improved antibacterial activities (MICs=2μg/mL) against Gram-negative bacterial strains (Escherichia coli 1924 and 1356). Compounds 4f and 4h were found to be the most potent with an MIC value of 1μg/mL against the Gram-negative bacterial strains Salmonella typhimurium 1926 and the fungus Candida albicans 7535. In addition, compound 4f displayed the most potent anti-inflammatory activity of all of the compounds prepared in the current study with 92.45% inhibition after intraperitoneal administration, making it more potent than the reference drugs indomethacin and ibuprofen. The cytotoxic activity of the compound 4f was assessed in HeLa, Hep3B and L02 cells.
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