Ammonia → HCID 178432590, compound

Participants

Reaction Steps

Aqueous ammonia solution (approximately 33% w /w, 1.2 ml) was added dropwise with stirring to a solution of 2-(2,6-dichloro-4-trifluoromethylphenyl)-4-methylimidazole-5-sulphonyl chloride (2.0 g, 0.005 mol) in dioxane (15 ml) and the mixture was stirred for 3 hours. It was poured into water (50 ml) and extracted with diethyl ether (3×25 ml). The combined extracts were washed with water (2×50 ml) dried over anhydrous sodium sulphate and evaporated to dryness. The residue was purified by mplc on silica eluted with a mixture of ethyl acetate and petroleum spirit (bp 60°-80° C.) (1:2). Recrystallization from a mixture of ethyl acetate and petroleum spirit (b.p. 60°-80° C.) (1:3) gave 2-(2,6-dichloro-4-trifluoromethylphenyl)-4-methylimidazole-5-sulphonamide (0.45 g), m.p. 266°-267° C., as an off-white solid.

Provenance & Evidence