Hydrochloric Acid → Ethyl 5-fluoro-4-oxo-3,4-dihydroquinazoline-2-carboxylate

Participants

Reaction Steps

To a suspension of ethyl ((2-(aminocarbonyl)-3-fluorophenyl)amino)(oxo)acetate (2.45 g, 9.64 mmol) in ethanol (50 mL) was added dropwise sodium ethylate (20% ethanol solution, 3.61 g, 10.6 mmol) under ice-cooling, and the mixture was stirred at room temperature for 1 hr. 1N Hydrochloric acid (20 mL) was added to the reaction mixture, and the insoluble material was collected by filtration. The solid was washed with water and diethyl ether to give the title compound as a pale-yellow powder (1.29 g, 57%).

Provenance & Evidence