反应详情

温度

25 °C

A mixture of 2-[3-(6-chloro-3,3-dimethyl-1,2,3,4-tetrahydro-quinolin-2-yl)-phenylamino]-2-methyl-propionic acid methyl ester (450 mg, 1.16 mmol) in tetrahydrofuran (30 mL), 2M lithium hydroxide in water (15 mL) was stirred at 25° C. for 12 h. The mixture was neutralized with a 3 N aqueous hydrochloric acid solution and extracted with ethyl acetate (2×100 mL), washed with water, dried over anhydrous sodium sulfate and then concentrated in vacuo. Purification by Waters automated flash system (column: Xterra 30 mm×100 mm, sample manager 2767, pump 2525, detector: ZQ mass and UV 2487, solvent system: acetonitrile and 0.1% formic acid in water) afforded 2-[3-(6-chloro-3,3-dimethyl-1,2,3,4-tetrahydro-quinolin-2-yl)-phenylamino]-2-methyl-propionic acid (50 mg, 11%) as a white solid: LC/MS m/e calcd for C21H25ClN2O2 (M+H)+: 373.90, observed: 373.1.

1. extractionextracted with ethyl acetate (2×100 mL)
2. washwashed with water
3. dry with materialdried over anhydrous sodium sulfate
4. concentrationconcentrated in vacuo
5. customPurification by Waters automated flash system (column: Xterra 30 mm×100 mm, sample manager 2767, pump 2525, detector: ZQ mass and UV 2487, solvent system: acetonitrile and 0.1% formic acid in water)