title: Synthesis of some thiazole-, 1,3,4-thiadiazole-, and 4H-1,2,4-triazole derivatives of pyrazolo[3,4-b]quinoline.
abstract: Three novel series of pyrazolo[3,4-b]quinolines were prepared, namely: 1-(3-substituted-4-phenylthiazolin-2-ylidene)hydrazinocarbonylm ethyl-1H-pyrazolo[3,4-b]quinolines 3a-d; 1-(5-substituted amino-1,3,4-thiadiazol-2-yl)methyl-1H-pyrazolo[3,4-b]quinolines 4b-d, and 1-(4-substituted-4H-5- thioxo-1,2,4-triazole-3-yl)methyl-1H-pyrazolo[3,4-b]quinolines 5a-d. These compounds were prepared by cyclization of the new key intermediates 1-(substituted thiocarbamoylhydrazinocarbonyl)methyl-1H- pyrazolo[3,4-b]quinolines 2a-d. The alkylthio, aralkylthio 6a-f as well as the Mannich bases 8a-f derived from compounds 5a-d were also prepared. The structures of the new compounds were elucidated by elemental analyses, IR, 1H-NMR-, and mass spectra. The antimicrobial as well as inotropic and chronotropic activities were studied.
authors.affiliation: Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Alexandria, Egypt.
authors.forename: A M
authors.initials: AM
authors.lastname: Farghaly
authors.forename: N S
authors.initials: NS
authors.lastname: Habib
authors.forename: M A
authors.initials: MA
authors.lastname: Khalil
authors.forename: O A
authors.initials: OA
authors.lastname: el-Sayed
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D001001:Anura; D001419:Bacteria / Q000187:drug effects; D002317:Cardiovascular Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D006339:Heart Rate / Q000187:drug effects; D066298:In Vitro Techniques; D008826:Microbial Sensitivity Tests; D009200:Myocardial Contraction / Q000187:drug effects; D011720:Pyrazoles / Q000138:chemical synthesis* / Q000494:pharmacology; D011804:Quinolines / Q000138:chemical synthesis* / Q000494:pharmacology; D013830:Thiadiazoles / Q000138:chemical synthesis* / Q000494:pharmacology; D013844:Thiazoles / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D002317:Cardiovascular Agents; D011720:Pyrazoles; D011804:Quinolines; D013830:Thiadiazoles; D013844:Thiazoles