Quinolone analogues 15: Synthesis and antimalarial activity of 4-phenyl-1-(1-triazolylmethyl-4-quinolon-3-ylcarbonyl)semicarbazide and related compounds

Yoshihisa Kurasawa, Kiminari Yoshida, Naoki Yamazaki, Kenji Sasaki, Yoshito Zamami, Zhao Min, Atsumi Togi, Hideyuki Ito, Eisuke Kaji, Haruhiko Fukaya

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The 1-hydrazinocarbonylmethyl-4-quinolone-3-carboxylate (10) was converted into the 1-(4-amino-1,2,4-triazol-3-ylmethyl)-4-quinolone-3-carboxylic acid (13), whose reaction with arylcarbaldehydes gave the 1-(4-arylmethyleneamino-1, 2,4-triazol-3-ylmethyl)-4-quinolone-3-carboxylic acids (5a, 5b, 5c, 5d, 5e, 5f, 5g). Compound 10 was also transformed into the 1-(4-amino-1,2,4-triazol-3- ylmethyl)-4-quinolone-3-carbohydrazide (15), whose reaction with phenyl isocyanate or phenyl isothiocyanate afforded the 4-phenyl-1-(1-triazolylmethyl- 4-quinolon-3-ylcarbonyl)semicarbazide (6a) or 4-phenyl-1-(1-triazolylmethyl-4- quinolon-3-ylcarbonyl)thiosemicarbazide (6b), respectively. Compounds 6a, 6b showed the in vitro antimalarial activity to chloroquine-resistant Plasmodium falciparum, wherein their IC50 was 3.89 and 3.91 μM, respectively.

Original languageEnglish
Pages (from-to)E249-E254
JournalJournal of Heterocyclic Chemistry
Issue numberSUPPL. 1
Publication statusPublished - Aug 2014


ASJC Scopus subject areas

  • Organic Chemistry

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