Different sulfonamides incorporating amido or ureido linkers were synthesized.
Inhibitory activity of these sulfonamides was evaluated toward hCA I, II, IX and XII.
9, 6b-g, 10c and 10e displayed outstanding potency against CA XII (KI: 0.47–0.71 nM).
Other derivatives emerged as single-digit nanomolar CA XII inhibitors (1.17–2.83 nM).