3-(Dimethylamino)-1-phenyl-2-propen-1-one → 7-Phenylpyrazolo[1,5-a]pyrimidine-3-carbonitrile

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Reaction Steps

A reaction mixture comprising 4.32 g. of 3-aminopyrazole-4-carbonitrile, 7.0 g. of 3-dimethylaminoacrylophenone and 25 ml. of glacial acetic acid is refluxed for 7 hours. The mixture is evaporated and the residue is treated as described in Example 1, giving the desired product, m.p. 230°-232° C.

Provenance & Evidence