A series of 50 sulfamates were obtained by reacting 4-aminophenol with isocyanates followed by sulfamoylation. Most of the new compounds were nanomolar inhibitors of the tumor-associated carbonic anhydrase (CA, EC 4.2.1.1) isoforms IX and XII, whereas they inhibited less cytosolic offtarget isoforms CA I and II. Some of these sulfamates showed significant antiproliferative activity in several breast cancer cell lines, such as SKBR3, MCF10A, ZR75/1, MDA-MB-361 and MCF7, constituting interesting anticancer leads.
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