反应详情

A stirred solution of methyl 4-(6-amino-2-methylpyridin-3-yl)benzoate (Description 7 in EP 97/17351, 300 mg, 1.2 mmole) and pyridine (0.16 ml, 2.0 mmole) in DCM (35 ml) at 0° C. under argon was treated with acetyl chloride (120 mg, 1.5 mmole) and allowed to warm to room temperature over 1 h. Additional acetyl chloride (120 mg) was added, the mixture maintained at room temperature for a further 1 h, then washed with 10% Na2CO3 solution, dried (Na2SO4) and concentrated under vacuum to afford the title compound as a white solid (344 mg, 98%).

1. temperaturethe mixture maintained at room temperature for a further 1 h
2. washwashed with 10% Na2CO3 solution
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated under vacuum