A series of 2-alkylthio-4,5-diarylimidazoles were synthesized in three steps. The reaction of ammonium thiocyanate with benzoylbenzoins 4 gave 4,5-diarylimidazole-2-thiones 5. Alkylation of compound 5 with alkyl iodide yielded 2-alkylthio-4,5-diarylimidazoles 6. Chlorosulfonation of compound 6 followed by ammonia gave the desired compounds 4-[2-alkylthio-4(5)-(4-substituted phenyl)imidazole-5(4)-yl]benzensulfonamides 7.
A series of 2-alkylthio-4,5-diarylimidazoles were synthesized in three steps. The reaction of ammonium thiocyanate with benzoylbenzoins 4 gave 4,5-diarylimidazole-2-thiones 5. Alkylation of compound 5 with alkyl iodide yielded 2-alkylthio-4,5-diarylimidazoles 6. Chlorosulfonation of compound 6 followed by ammonia gave the desired compounds 4-[2-alkylthio-4(5)-(4-substituted phenyl)imidazole-5(4)-yl]benzensulfonamides 7.