A small library of 25 triazole/tetrazole-based sulfonamides have been synthesized and further evaluated for their inhibitory activity against thrombin, trypsin, tryptase and chymase. In general, the triazole-based sulfonamides inhibited thrombin more efficiently than the tetrazole counterparts. Particularly, compound 26 showed strong thrombin inhibition (K(i)=880 nM) and significant selectivity against other human related serine proteases like trypsin (K(i)=729 μM). Thrombin binding affinity of the same compound was determined by ITC and demonstrated that the binding of this new triazole-based scaffold is enthalpically driven, making it a good candidate for further development.
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| http://dx.doi.org/10.1016/j.bmcl.2011.07.023 | DOI Listing |
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