[Synthesis and antiparasitic activity of arylproprenones in the nitro-5-imidazole series].

The synthesis of new arylpropenones derived from 1-methyl-5-nitro imidazole is described. The investigation of some antiprotozoal properties has shown that compounds with the groups 4-hydroxyphenyl, 4-chlorophenyl or thiophenyl have trichomonacidal activity similar to that of metronidazole.

[Synthesis and antiparasitic activity of new nitro-5-imidazole derivatives].

Syntheses are given for derivatives of the type: 2-amino-1-[(1-methyl-5-nitro-2-imidazolyl) methyleneimino] imidazole, of new hydrazones of 1-methyl-5-nitroimidazole-2-carboxaldehyde and also for semicarbazones and a hydrazone of 1-methyl-5-nitro-2-(4-formyl-styryl)imidazole.

[Synthesis of new diheterocyclic derivatives of imidazole with antiparasitic activity].

A description is given of potential cyclic imidazoles such as 3,3-dichloro-2-methylenimino-acrylonitrile derived from nitro or non-nitro heterocycles, as well as the hydrazone, semicarbazone and arylpropenone derivatives of the 4-chloro-2-(5-nitro-2-thienyl) (V), 5-imidazole carboxaldehyde (IV) and the 5-bromothienyl analogue. The antiparasitic activity was tested in vitro against Trichomonas vaginalis and Entameba histolytica. Some of the nitro containing compounds showed trichomonacidal activity whereas one of the non-nitro compounds with potential imidazole structure showed clear amebacidal activity.