反应详情

To a solution of methyl (+/−)-6-((cyclopentyl(3,5-dimethyl-4-(4-(trifluoromethyl)-1H-pyrazol-1-yl)phenyl)methyl)amino)nicotinate (753 mg, 1.59 mmol) in tetrahydrofuran (7.97 mL) and methanol (7.97 mL) was added 1 N aq sodium hydroxide (7.97 mL, 7.97 mmol). After 16 h, the solution was concentrated under reduced pressure to remove tetrahydrofuran and methanol. 1 N aq hydrochloric acid was added until the mixture was at pH 4. The mixture was diluted with sat. aq sodium chloride (30 mL) and extracted with ethyl acetate (3×50 mL). The combined organics were dried (Na2SO4) and filtered, and the filtrate was concentrated under reduced pressure to provide (+/−)-6-((cyclopentyl(3,5-dimethyl-4-(4-(trifluoromethyl)-1H-pyrazol-1-yl)phenyl)methyl)amino)nicotinic acid. 1H NMR (400 MHz, CDCl3, δ): 8.68 (s, 1H), 8.14 (d, J=9.2 Hz, 1H), 7.94 (s, 1H), 7.75 (s, 1H), 7.15 (s, 2H), 6.39 (d, J=9.2 Hz, 1H), 4.28-4.18 (m, 1H), 2.44-2.31 (m, 1H), 2.12-2.05 (m, 1H), 2.01 (s, 6H), 1.78-1.40 (m, 6H), 1.36-1.28 (m, 1H). MS (M+1): 459.5.

1. concentrationthe solution was concentrated under reduced pressure
2. customto remove tetrahydrofuran and methanol
3. addition1 N aq hydrochloric acid was added until the mixture
4. additionThe mixture was diluted with sat. aq sodium chloride (30 mL)
5. extractionextracted with ethyl acetate (3×50 mL)
6. dry with materialThe combined organics were dried (Na2SO4)
7. filtrationfiltered
8. concentrationthe filtrate was concentrated under reduced pressure