Potassium hydroxide ethanol → 2-[2-Hydroxy-5-(pyrrolidine-1-carbonyl)-phenyl]-quinoline-6-carboxylic Acid

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Reaction Steps

Compound 18 (410 mg, 1.75 mmol) and Compound 7 (315 mg, 1.75 mmol) were dissolved in 30 mL of ethanol, 2.45 mL of a 10% KOH/ethanol solution was added and the mixture was refluxed overnight under argon. The ethanol was evaporated, the residue dissolved in water, and acidified with 3 mL of 1M HCl. The formed gel was solidified by addition of 30 mL of ethyl acetate and 30 mL of a saturated NaCl solution. The solid was filtered, awashed with water, and dried. Yield 302 mg (48%) Compound 19.

Provenance & Evidence