反应详情

Following the procedures described for Example 21, {4-methyl-3-[4-nitro-2-(2,2,2-trifluoro-ethylsulfanylmethyl)-phenoxy]-phenyl}-acetic acid methyl ester was reduced to {3-[4-amino-2-(2,2,2-trifluoro-ethylsulfanylmethyl)-phenoxy]-4-methyl-phenyl}-acetic acid methyl ester and then treated with pivaloyl chloride to provide {3-[4-(2,2-dimethyl-propionylamino)-2-(2,2,2-trifluoro-ethylsulfanylmethyl)-phenoxy]-4-methyl-phenyl}-acetic acid methyl ester. Hydrolysis of the ester provided the acid.