Y. Leblanc et al., SYNTHESIS AND BIOLOGICAL EVALUATION OF 2,3-DIARYLTHIOPHENES AS SELECTIVE COX-2 AND COX-1 INHIBITORS, Bioorganic & medicinal chemistry letters, 5(18), 1995, pp. 2123-2128
A series of 2,3-diarylthiophene compounds was prepared and their biolo
gical activities were evaluated against human Cox-1 and Cox-2 enzymes.
It appears that the methylsulfone group is essential for both the act
ivity and selectivity for the Cox-2 enzyme. Removal of the methylsulfo
ne group gave relatively selective Cox-1 inhibitors.