5-[1-Methyl-3-(trifluoromethyl)-1h-pyrazol-5-yl]thiophene-2-sulfonyl chloride → 4-{3-[5-(2-methyl-5-trifluoromethyl-2H-pyrazol-3-yl)-thiophene-2-sulfonylamino]-benzoylamino}-benzoic acid ethyl ester

Participants

Reaction Steps

4-{3-[5-(2-Methyl-5-trifluoromethyl-2H-pyrazol-3-yl)-thiophene-2-sulfonlyamino]-benzoylamino}-benzoic acid, MS (ISP): m/e=549.2 (M−H), was prepared in analogy to example 1, steps A to D. Step C was performed using 5-(2-methyl-5-trifluoromethyl-2H-pyrazol-3-yl)-thiophene-2-sulfonyl chloride and yielded 4-{3-[5-(2-methyl-5-trifluoromethyl-2H-pyrazol-3-yl)-thiophene-2-sulfonylamino]-benzoylamino}-benzoic acid ethyl ester, which was hydrolyzed in step D.

Provenance & Evidence