反应详情

To a stirred solution of [rac]-4-{2-[2-(4-chloro-phenyl)-4,5,6,7-tetrahydro-2H-indazol-3-yl]-2-cyclohexyl-ethylsulfanyl}-benzoic acid methyl ester (22 mg, 0.043 mmol) in MeOH (5 ml) was added NaOH (5.18 mg, 0.129 mmol) in water (2 ml) dropwise at 0° C. The reaction mixture was then stirred at rt for 14 hours. After the completion of the reaction (monitored through TLC), MeOH was concentrated in vacuo, diluted with H2O (7 ml) and the aqueous layer was acidified (pH ˜2-3) with 2 N HCl and then extracted with EtOAc (3×7 ml). Combined organic layers were washed with brine (8 ml) and finally dried over Na2SO4. Organic layer was distilled under reduced pressure to get off white solid (20 mg), which was purified by column chromatography [SiO2 (230-400 mesh), DCM:MeOH 98.0/2.0] to give the title compound (18 mg, 84.1%) as a off white solid. MS: m/e=495.0 [M+H±].

1. concentrationwas concentrated in vacuo
2. additiondiluted with H2O (7 ml)
3. extractionextracted with EtOAc (3×7 ml)
4. washCombined organic layers were washed with brine (8 ml)
5. dry with materialfinally dried over Na2SO4
6. distillationOrganic layer was distilled under reduced pressure