title: Synthesis of some halogen-containing 1,2,4-triazolo-1,3,4-thiadiazines and their antibacterial and anticancer screening studies--part I.
abstract: A series of 7-arylidene-6-(2,4-dichloro-5-fluorophenyl)-3-substituted-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazines (3) were prepared by the condensation of 4-amino-5-mercapto-3-substituted-1,2,4-triazoles (1) and 3-aryl-1-(2,4-dichloro-5-fluorophenyl)-2-bromo-2-propen-1-one (2). An alternative route for the synthesis of the title compound 3 has been described. The newly synthesised compounds were characterised on the basis of N-analyses, IR, 1H NMR and mass spectral data. Some of the newly synthesised compounds were tested for their antibacterial activities against Gram + ve and Gram - ve bacteria. Among the tested compounds 3n showed the highest degree of antibacterial activity against S. aureus and evaluation of the LD50 value of this compound was carried out. Some of the newly synthesised compounds were also screened for their anticancer activities. Among these, compounds 3b, 3g, 3n and 3p are found to be active against NCI-H460 (lung), MCF7 (breast), SF 268 (CNS) in the preliminary anticancer screening studies. Further, 60-cell-line anticancer studies of these compounds were carried out. The results of such studies are discussed in this paper.
authors.affiliation: Department of Post Graduate Studies and Research in Chemistry, Mangalore University, Karnataka, India. hollabs@yahoo.com
authors.forename: B S
authors.initials: BS
authors.lastname: Holla
authors.forename: B K
authors.initials: BK
authors.lastname: Sarojini
authors.forename: B S
authors.initials: BS
authors.lastname: Rao
authors.forename: P M
authors.initials: PM
authors.lastname: Akberali
authors.forename: N S
authors.initials: NS
authors.lastname: Kumari
authors.forename: V
authors.initials: V
authors.lastname: Shetty
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D005260:Female; D006801:Humans; D006846:Hydrocarbons, Halogenated / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D007928:Lethal Dose 50; D008297:Male; D008826:Microbial Sensitivity Tests; D013329:Structure-Activity Relationship; D013829:Thiadiazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D000970:Antineoplastic Agents; D006846:Hydrocarbons, Halogenated; D013829:Thiadiazines