反应详情

Trifluoroacetic acid (5 mL) and thioanisole (3 drops) were added to quinoline-6-carboxylic acid 4-benzyloxybenzylamide (2.67 g, 7.25 mmol) synthesized in Example E-8, the solution was stirred at room temperature for 14 hours, followed by stirring at 50° C. for 4 hours, lastly, and the solution was stirred at 70° C. for 3 hours. The reaction solution was allowed to room temperature, then, was neutralized with an aqueous solution of saturated sodium bicarbonate, extracted with ethyl acetate and dried over anhydrous magnesium sulfate. The solvent was evaporated, the residue was purified by NH silica gel column chromatography (ethyl acetate), and the title compound (433 mg, 22%) was obtained as a colorless solid.

1. stirringby stirring at 50° C. for 4 hours
2. stirringlastly, and the solution was stirred at 70° C. for 3 hours
3. customwas allowed to room temperature
4. extractionextracted with ethyl acetate
5. dry with materialdried over anhydrous magnesium sulfate
6. customThe solvent was evaporated
7. customthe residue was purified by NH silica gel column chromatography (ethyl acetate)