反应详情

A mixture of 5-((4-methoxybenzyl)oxy)-4-oxo-4H-pyran-2-carboxylic acid (1.4627 g, 5.30 mmol) and methanamine (11.0 ml, 22.00 mmol) was stirred at room temperature for 20 h, The reaction was concentrated under reduced pressure, and the residue was dissolved in 15 mL of de-ionized water. The aqueous solution was cooled in an ice bath and treated dropwise with 2N hydrochloric acid (3.0 ml, 6.00 mmol). The resulting yellow solid was filtered, washed with water and acetone, and dried to give 5-((4-methoxybenzyl)oxy)-1-methyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid (1.21 g, 4.18 mmol, 79% yield). LCMS: (M+H)+: 290.1.

1. concentrationThe reaction was concentrated under reduced pressure
2. dissolutionthe residue was dissolved in 15 mL of de-ionized water
3. temperatureThe aqueous solution was cooled in an ice bath
4. filtrationThe resulting yellow solid was filtered
5. washwashed with water and acetone
6. customdried