反应详情

6-{4-Chloro-3-[2-(2-chloro-pyridin-4-yl)-3,3,3-trifluoro-2-hydroxy-1-methyl-propyl]-phenoxy}-nicotinic acid methyl ester (14 mg, obtained in Example 132) was dissolved in THF (5 mL). The mixture was cooled in an ice bath and aqueous LiOH solution (1.0 M, 0.048 mL) was added. The mixture was stirred over night at r.t. The reaction mixture was poured into water and extracted with ethyl acetate. The aqueous phase was acidified with 2 M aqueous HCl to pH 1 and extracted three times with ethyl acetate. The combined organic layers were washed with brine, dried over Na2SO4 and the solvent was evaporated. The title compound was obtained as an off-white solid (12 mg, 88%) and was used without further purification. MS (neg. ion, m/e)=485.0 [(M−H)−].

1. temperatureThe mixture was cooled in an ice bath
2. extractionextracted with ethyl acetate
3. extractionextracted three times with ethyl acetate
4. washThe combined organic layers were washed with brine
5. dry with materialdried over Na2SO4
6. customthe solvent was evaporated