-
Comparative Study
2-Acetylpyridine thiosemicarbazones. 8. Derivatives of 1-acetylisoquinoline as potential antimalarial agents.
- D L Klayman, J P Scovill, J Bruce, and J F Bartosevich.
- J. Med. Chem. 1984 Jan 1; 27 (1): 84-7.
AbstractA series of 1-acetylisoquinoline thiosemicarbazones was prepared in order to evaluate their antimalarial properties. This was achieved by the reaction of 1-acetylisoquinoline with methyl hydrazinecarbodithioate to give methyl 3-[1-(1-isoquinolinyl)ethylidene]hydrazinecarbodithioate (II). Displacement of the S-methyl group from this intermediate by various primary and secondary amines afforded the desired 1-acetylisoquinoline thiosemicarbazones (III). Thiosemicarbazides in which the azomethine moiety of the latter was reduced could be prepared by the reaction of II with NaBH4 to give methyl 3-[1-(1-isoquinolinyl)ethyl]hydrazinecarbodithioate (VIII). Reaction of VII with the appropriate amine gave 1-[1-(1-isoquinolinyl)ethyl]thiosemicarbazides (IX). Evaluation of the antimalarial activity of series III and IX in mice infected with Plasmodium berghei indicated that cures were attainable at dose levels of 40-160 mg/kg.
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