3',4'-Dimethyl-3-dimethylaminoacrylophenone → Ethyl 7-(3,4-dimethylphenyl)pyrazolo[1,5-a]pyrimidine-3-carboxylate

Beteiligte Stoffe

Reaktionsschritte

A mixture of 4.06 g. of 3',4'-dimethyl-3-dimethylaminoacrylophenone and 3.10 g. of ethyl 3-aminopyrazole-4-carboxylate in 25 ml. of glacial acetic acid is refluxed for 6 hours. The desired compound is recovered as in previous examples except that the compound as first observed is amorphous and then crystallizes on standing in the crystallization solvent, m.p. 187°-188° C.

Herkunft & Nachweise