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Anti-Cancer Agents in Medicinal Chemistry

Author(s): Pavitra S. Thacker, Arifuddin Mohammed*, Claudiu T. Supuran*, Prerna L. Tiwari, Nerella S. Goud, Danaboina Srikanth and Andrea Angeli

DOI: 10.2174/1871520622666220304184525

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Synthesis and Biological Evaluation of Coumarin Carboxamides as Selective and Potent Inhibitors of Carbonic Anhydrases IX and XII

Page: [2647 - 2654] Pages: 8

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Abstract

Background: Carbonic anhydrases (CAs, EC 4.2.1.1) catalyze the reversible hydration of carbon dioxide to bicarbonate and proton. Inhibition of isoforms IX and XII could aid in the amelioration of cancer.

Objective: A series of coumarin carboxamides (6a-j) were synthesized and were assayed against hCA isoforms I, II, IX, and XII.

Methods: Thin Layer Chromatography (TLC) analysis was done by utilizing Merck silica gel 60 F254 aluminum plates. Stuart Digital Melting Point Apparatus (SMP 30) was used in determining the melting points of the compounds, which are uncorrected. High Resolution Mass Spectra (HRMS) were determined by Agilent QTOF mass spectrometer 6540 series instrument and were performed using ESI techniques at 70eV.

Results: All the compounds selectively inhibited isoforms IX and XII as against hCAs I and II. Compounds 6a-e exhibited the best inhibitory profiles against hCA IX (Ki < 25 nM). The isoform hCA XII was effectively inhibited by all compounds showing the Ki values less than 65 nM. The Compounds 6a, 6b, 6g, 6h, and 6j exhibited Ki values less than 10 nM. The binding interactions of the most potent compounds, 6a and 6b, were investigated through docking studies with hCAs IX and XII.

Conclusion: These compounds may be utilized as useful starting points for the design and development of selective and potent hCA IX and XII inhibitors.

Keywords: Carbonic anhydrases, hCA IX, hCA XII, coumarin, carboxamides, sulfonamides.

Graphical Abstract

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