Ethyl 3,4-dimethoxybenzoylacetate → HCID 178488705, compound

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Reaction Steps

3-Aminopyrazole (33.2 g) and 110 g of ethyl 3,4-dimethoxybenzoylacetate are stirred in 500 ml of glacial acetic acid for 6 hours at 80° C. After cooling the crystallized-out product is filtered off under suction, washed with diethyl ether and dried. There are obtained 45 g of 5-(3,4-dimethoxyphenyl)pyrazolo[1,5-a]pyrimidin-7-ol of m.p. 268°-270° C.

Provenance & Evidence