Hydrochloric Acid → 4-(Propylamino)-2-((2-(pyridin-4-yl)ethyl)amino)pyrimidine-5-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

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.

Provenance & Evidence