Design and synthesis of benzenesulfonamide-linked imidazo[2,1-b][1,3,4]thiadiazole derivatives as carbonic anhydrase I and II inhibitors. 2021

Baijayantimala Swain, and Kamtam Aashritha, and Priti Singh, and Andrea Angeli, and Abhay Kothari, and Dilep K Sigalapalli, and Venkata M Yaddanapudi, and Claudiu T Supuran, and Mohammed Arifuddin
Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India.

A novel series of imidazothiadiazole-linked benzenesulfonamide derivatives (5a-t) was synthesized and subjected for screening against the four physiologically and pharmacologically relevant human carbonic anhydrase (hCA) isoforms: hCA I, II, VA, and IX. The compounds selectively inhibited hCA I and II over hCA VA and IX. Furthermore, among the two cytosolic isoforms, hCA II was more effectively inhibited as compared with hCA I. The most active compounds were 5o with K i  = 0.246 µM and 5p with K i  = 0.376 µM against hCA II, whereas compound 5f showed good inhibition against both hCA I and II with K i  = 0.493 and 0.4 µM, respectively. This class of underexplored sulfonamides may be used to design isoform-selective CA inhibitors targeting enzymes of medicinal chemistry interest.

UI MeSH Term Description Entries
D007093 Imidazoles Compounds containing 1,3-diazole, a five membered aromatic ring containing two nitrogen atoms separated by one of the carbons. Chemically reduced ones include IMIDAZOLINES and IMIDAZOLIDINES. Distinguish from 1,2-diazole (PYRAZOLES).
D002256 Carbonic Anhydrases A family of zinc-containing enzymes that catalyze the reversible hydration of carbon dioxide. They play an important role in the transport of CARBON DIOXIDE from the tissues to the LUNG. EC 4.2.1.1. Carbonate Dehydratase,Carbonic Anhydrase,Anhydrases, Carbonic,Dehydratase, Carbonate
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000096926 Benzenesulfonamides A group of compounds that contain sulfonamide group S-linked to a benzene ring. Many benzenesulfonamide derivatives are pharmaceuticals (e.g., BOSENTAN; SULFAPYRIDINE; and SULFADIAZINE; CELECOXIB) as their sulfonamide moiety target various enzymes (e.g., CARBONIC ANHYDRASES; ACETYLCHOLINESTERASE; BUTYRYLCHOLINESTERASE; and CYCLOOXYNENASE 2). Benzenesulfonamide,Benzenesulfonamide Derivatives,Benzenesulfonamide Monosodium Salt,Benzenesulphonamides,Benzosulfonamides
D013329 Structure-Activity Relationship The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups. Relationship, Structure-Activity,Relationships, Structure-Activity,Structure Activity Relationship,Structure-Activity Relationships
D013449 Sulfonamides A group of compounds that contain the structure SO2NH2. Sulfonamide,Sulfonamide Mixture,Sulfonamide Mixtures,Mixture, Sulfonamide,Mixtures, Sulfonamide
D013830 Thiadiazoles Heterocyclic compounds composed of a five-membered heterocyclic ring which contains one sulfur and two nitrogen atoms. Thiadiazole
D062105 Molecular Docking Simulation A computer simulation technique that is used to model the interaction between two molecules. Typically the docking simulation measures the interactions of a small molecule or ligand with a part of a larger molecule such as a protein. Molecular Docking,Molecular Docking Simulations,Molecular Docking Analysis,Analysis, Molecular Docking,Docking Analysis, Molecular,Docking Simulation, Molecular,Docking, Molecular,Molecular Docking Analyses,Molecular Dockings,Simulation, Molecular Docking
D024401 Carbonic Anhydrase I A cytosolic carbonic anhydrase isoenzyme primarily expressed in ERYTHROCYTES, vascular endothelial cells, and the gastrointestinal mucosa. EC 4.2.1.- CA I Hiroshima-1,Carbonic Anhydrase B,Carbonic Anhydrase I Hiroshima-1,Carbonic Anhydrase Isoenzyme B,Anhydrase B, Carbonic,CA I Hiroshima 1,Carbonic Anhydrase I Hiroshima 1
D024402 Carbonic Anhydrase II A cytosolic carbonic anhydrase isoenzyme found widely distributed in cells of almost all tissues. Deficiencies of carbonic anhydrase II produce a syndrome characterized by OSTEOPETROSIS, renal tubular acidosis (ACIDOSIS, RENAL TUBULAR) and cerebral calcification. EC 4.2.1.- Carbonic Anhydrase C,Carbonic Anhydrase Isoenzyme C

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