title: Synthesis and characterization of metal complexes of heterocyclic sulfonamide as carbonic anhydrase inhibitors.
abstract: Three novel metal complexes of N-[5-(aminosulfonyl)-1,3,4-thiadiazol-2-yl]-4-benzoyl-1-(3-nitrophenyl)-5-phenyl-1H-pyrazole-3-carboxamide which possess strong carbonic anhydrase (CA) inhibitory properties have been synthesised. The structure of these compounds has been investigated by elemental analysis, FT-IR, LC/MS, UV-vis spectrophotometric method and magnetic susceptibility. Human carbonic anhydrase isoenzymes hCA-I and hCA-II were purified from erythrocyte cells by the affinity chromatography. The inhibitory effects of newly synthesized complexes and acetazolamide (AAZ) as a control compound on hydratase and esterase activities of these isoenzymes have been studied in vitro by comparing IC(50) and K(i) values and it has been found that the newly synthesised complexes behave as very powerful inhibitors against hCA-I and hCA-II than parent ligand (1) and than AAZ.
authors.affiliation: Department of Chemistry, Art and Science Faculty, Dumlupinar University, Kutahya, Turkey. sakaryan68@hotmail.com
authors.forename: Nurgün
authors.initials: N
authors.lastname: Büyükkidan
authors.forename: Metin
authors.initials: M
authors.lastname: Bülbül
authors.forename: Rahmi
authors.initials: R
authors.lastname: Kasimoğullari
authors.forename: Bülent
authors.initials: B
authors.lastname: Büyükkidan
mesh_terms: D002257:Carbonic Anhydrase Inhibitors / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D002256:Carbonic Anhydrases / Q000302:isolation & purification / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D004912:Erythrocytes / Q000201:enzymology; D006571:Heterocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D020033:Protein Isoforms / Q000037:antagonists & inhibitors / Q000302:isolation & purification / Q000378:metabolism; D013329:Structure-Activity Relationship; D013449:Sulfonamides / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D002257:Carbonic Anhydrase Inhibitors; D006571:Heterocyclic Compounds; D009942:Organometallic Compounds; D020033:Protein Isoforms; D013449:Sulfonamides; D002256:Carbonic Anhydrases