title: New pyrazoles incorporating pyrazolylpyrazole moiety: synthesis, anti-HCV and antitumor activity.
abstract: Three series of novel pyrazole derivatives 2b-d, 4a-d and 6a-d were synthesized via two step procedure that utilizes hydrazonoyl chlorides 1a-d and enaminones 3a-d and 5a-d, respectively as starting materials. The structures of all the newly synthesized products have been established on the basis of analytical and spectral data. Moreover, some of the products 2-6 were tested against HCV and Subacute Sclerosing Panencephalitis (SSPE). In addition, compounds 2-6 were also tested for the inhibition of peroxynitrite-induced tyrosine nitration and antioxidant activity. The tested compounds are highly effective at very low concentration as anti-HCV, SSPE antioxidant and anticancer in the following ascending order 2d, 4c, 6b, 3b, 6c, 4d, 2b, 2c, 2a, 6a, 5b, 5a, 3a, 4b and 5c. It is worth to mention that all tested compounds are more potent than the reference standards used for comparing activity. All the measurements revealed that the mechanism of action of the anti cancer activities of all the tested compounds is topoisomerase I inhibitor.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Cairo, Giza 12613, Egypt.
authors.forename: Sayed M
authors.initials: SM
authors.lastname: Riyadh
authors.forename: Thoraya A
authors.initials: TA
authors.lastname: Farghaly
authors.forename: Magda A
authors.initials: MA
authors.lastname: Abdallah
authors.forename: Mohamed M
authors.initials: MM
authors.lastname: Abdalla
authors.forename: Mohamed R
authors.initials: MR
authors.lastname: Abd El-Aziz
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000494:pharmacology; D000998:Antiviral Agents / Q000138:chemical synthesis / Q000494:pharmacology; D045744:Cell Line, Tumor; D002851:Chromatography, High Pressure Liquid; D003110:Colonic Neoplasms / Q000188:drug therapy; D006224:Cricetinae; D004354:Drug Screening Assays, Antitumor; D005260:Female; D016174:Hepacivirus / Q000187:drug effects*; D051379:Mice; D008810:Mice, Inbred C57BL; D015394:Molecular Structure; D011720:Pyrazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D013344:Subacute Sclerosing Panencephalitis / Q000188:drug therapy
chemical_list: D000970:Antineoplastic Agents; D000998:Antiviral Agents; D011720:Pyrazoles