1-Butanol → 5,6-Dihydro-5-oxopyrazolo[1,5-c]quinazoline-2-carboxylic acid, n-butyl ester

Participants

Reaction Steps

To a suspension of 4.6 g (0.019 mole) of 5,6-dihydro-5-oxopyrazolo[1,5-c]quinazoline-2-carbonyl chloride in 200 ml of pyridine under nitrogen is added, slowly in a dropwise fashion, a solution of 1.98 g (0.019 mole) of n-butanol. After stirring overnight at room temperature, the reaction mixture is filtered and the filtrate concentrated to a small volume and diluted with cold water. The title compound is filtered off and dried, m.p. 198°-200°.

Provenance & Evidence