We report the synthesis and results from the in vitro evaluation of 6-(adamantan-2-ylidene- hydroxybenzoxazole)-O-sulfamate 1 as an irreversible inhibitor of human steroid sulfatase (STS). Highly straightforward, condensation of 2-methyl-6-hydroxybenzoxazole with 2- adamantanone, subsequent elimination of water and sulfamoylation provide the title compound in 45% overall yield from the inexpensive 2, 4-dihydroxyacetophenone. 1 was ...