title: Synthesis and antitumor activity studies of some new fused 1,2,4-triazole derivatives carrying 2,4-dichloro-5-fluorophenyl moiety.
abstract: A series of 3-(2,4-dichloro-5-fluorophenyl)-6-(substituted phenyl)-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazines (4) (Fig. 1) have been synthesized by the cyclization of 3-(2,4-dichloro-5-fluorophenyl)-1,2,4-triazol-5-thiol (3) with substituted phenacyl bromides. All the newly synthesized compounds were confirmed by IR, (1)H NMR and mass spectral studies. Among the compounds tested for their antitumor activity three compounds exhibited in vitro antitumor activity with moderate to excellent growth inhibition against a panel of sixty cancer cell lines of leukemia, non-small cell lung cancer, melanoma, ovarian cancer, prostate and breast cancer. The compound 4d showed promising antiproliferative activity with GI(50) values in the range of 1.06-25.4 microM.
authors.affiliation: Department of Chemistry, Manipal Institute of Technology, Manipal University, Manipal-576104, India.
authors.forename: K Subrahmanya
authors.initials: KS
authors.lastname: Bhat
authors.forename: Boja
authors.initials: B
authors.lastname: Poojary
authors.forename: D Jagadeesh
authors.initials: DJ
authors.lastname: Prasad
authors.forename: Prashantha
authors.initials: P
authors.lastname: Naik
authors.forename: B Shivarama
authors.initials: BS
authors.lastname: Holla
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D045744:Cell Line, Tumor; D002713:Chlorine / Q000737:chemistry; D004354:Drug Screening Assays, Antitumor; D005461:Fluorine / Q000737:chemistry; D006801:Humans; D015394:Molecular Structure; D014230:Triazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D014230:Triazoles; D005461:Fluorine; C045575:1,2,4-triazole; D002713:Chlorine