title: Synthesis and biological evaluation of 5-formyl-6-arylimidazo(2,1-b)-1,3,4-thiadiazole-2-N-(dimethylaminomethi no) sulfonamides as antitumor agents.
abstract: In search for potential anti cancer drug candidates in imidazo (2,1-b)-1,3,4-thiadiazole series, two series of 5-formyl-6-arylimidazo(2,1-b)-1,3,4-thiadiazole-2-N- (dimethylaminomethino) sulfonamides and 5-bromo-6-aryl/ethylacetateimidazo(2,1-b)-1,3,4- thiadiazole-2-sulfonamides were synthesised. All compounds showed significant cytotoxic effects (log10 GI50 < -4.0, log molar drug concentration required to cause 50% growth inhibition) against a variety of human tumor cell lines of the National Cancer Institute in vitro screen, including cells derived from solid tumors such as non-small cell lung, colon, central nervous system, melanoma, ovarian, prostate and breast cancer, and also few cell lines of leukemia and renal cancer. Introduction of a formyl group at the 5- and substituted aromatic group at 6-position generated compounds with potent antitumor activity. Incorporation of a bromo at 5- and ester group at 6-position produced compounds with reduced activity.
authors.affiliation: Department of Medicinal Chemistry, College of Pharmacy, Jawaharlal Nehru Medical College, Belgaum, Karnataka, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Gadad
authors.forename: S S
authors.initials: SS
authors.lastname: Karki
authors.forename: V G
authors.initials: VG
authors.lastname: Rajurkar
authors.forename: B A
authors.initials: BA
authors.lastname: Bhongade
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002470:Cell Survival / Q000187:drug effects; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013055:Spectrophotometry, Infrared; D013329:Structure-Activity Relationship; D013830:Thiadiazoles / Q000138:chemical synthesis* / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D013830:Thiadiazoles