Hydrochloric Acid → 8-Chloro-3,3-dimethyl-2-(3-morpholin-4-yl-phenyl)-1,2,3,4-tetrahydro-quinoline-5-carboxylic acid

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Reaction Conditions

Reaction Steps

To a stirred mixture solution of 8-chloro-3,3-dimethyl-2-(3-morpholin-4-yl-phenyl)-1,2,3,4-tetrahydro-quinoline-5-carboxylic acid methyl ester (200 mg, 0.5 mmol) in methanol (5.0 mL) and tetrahydrofuran (5.0 mL) was added 50% sodium hydroxide in water (1.0 mL). The reaction mixture was stirred at 70° C. for 6 hours. 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% ammonium hydroxide in water) afforded 8-chloro-3,3-dimethyl-2-(3-morpholin-4-yl-phenyl)-1,2,3,4-tetrahydro-quinoline-5-carboxylic acid (180 mg, 90%) as a light yellow solid: LC/MS m/e calcd for C22H25ClN2O3 (M+H)+: 401.91, observed: 401.1.

Provenance & Evidence