反应详情

温度

40 °C

A mixture of 4-(propylamino)-2-((2-(pyridin-4-yl)ethyl)amino)pyrimidine-5-carboxylic acid ethyl ester (A2, 9.2 g), ethanol (115 mL), tetrahydrofuran (58 mL) and 2.0 mol/L aqueous sodium hydroxide (115 mL) was stirred at 40° C. for 4 hours, and then further stirred at 60° C. for 3 hours. The reaction mixture was cooled to room temperature, then 12 mol/L aqueous hydrochloric acid (19.5 mL) was added to the mixture (pH 5 to 6), and the organic solvent was evaporated under reduced pressure. The solid matter was taken by filtration, washed with water, and then dried under reduced pressure to obtain 4-(propylamino)-2-((2-(pyridin-4-yl)ethyl)amino)pyrimidine-5-carboxylic acid (A3, 9.3 g) as white solid.

1. stirringfurther stirred at 60° C. for 3 hours
2. temperatureThe reaction mixture was cooled to room temperature
3. customthe organic solvent was evaporated under reduced pressure
4. filtrationThe solid matter was taken by filtration
5. washwashed with water
6. customdried under reduced pressure