In an effort to identify novel inhibitors of AP-1 and NF-κB mediated transcriptional activation, several analogues of ethyl 4-[(3-methyl-2, 5-dioxo (3-pyrrolinyl)) amino]-2-(trifluoromethyl) pyrimidine-5-carboxylate (1) were synthesized and tested in two in vitro assays. The 2-(2′- thienyl) substituted compound (11) was identified as the most potent in this series.