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Bioorg Med Chem Lett. 2011 Sep 15;21(18):5210-3. doi: 10.1016/j.bmcl.2011.07.045. Epub 2011 Jul 21.

Synthesis of rhodamine B-benzenesulfonamide conjugates and their inhibitory activity against human α- and bacterial/fungal β-carbonic anhydrases.

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Institut des Biomolécules Max Mousseron, UMR 5247 CNRS-UM1-UM2, Bâtiment de Recherche Max Mousseron, Ecole Nationale Supérieure de Chimie de Montpellier, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex, France.


A series of fluorescent sulfonamide carbonic anhydrase (CA, EC inhibitors were obtained by attaching rhodamine B moieties to the scaffold of benzenesulfonamides. The new compounds have been investigated for the inhibition of 12 human α-CA isoforms (hCA I-hCA XIV), three bacterial and one fungal β-class enzymes from the pathogens Mycobacterium tuberculosis and Candida albicans. All types of inhibitory activities have been detected, with several compounds showing low nanomolar inhibition against the transmembrane isoforms hCA IX, XII (cancer-associated) and XIV. The β-CAs were inhibited in the micromolar range by these compounds which may have applications for the imaging of hypoxic tumors or bacteria due to their fluorescent moieties.

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