反应详情

Compound 1 (20.4 g, 84.0 mmol) obtained in Reference Example 12 was dissolved in trifluoroacetic acid (168 mL), and anisole (91.1 mL, 0.840 mol) was added thereto, followed by stirring at room temperature for 3 hours. The reaction mixture was concentrated under reduced pressure, and the resulting residue was reslurried with ethyl acetate to afford 2-oxo-1,2-dihydropyridine-4-carboxylic acid (6.99 g, 60%) as a white solid.

1. concentrationThe reaction mixture was concentrated under reduced pressure