Hydrazine hydrate (1:1) → HCID 178469913, compound

Participants

Reaction Steps

A mixture of 1.41 g of ethyl 2-(2-chlorobenzoyl)-3-(N,N-dimethylamino)acrylate (a compound described in JP-A 7-101940), 0.30 g of hydrazine monohydrate and 5 ml of acetic acid was stirred at room temperature for 10 hours. The reaction mixture was concentrated under reduced pressure. Water was poured into the residue, and the mixture was extracted with ethyl acetate. The organic layer was washed with water, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to obtain ethyl 3-(2-chlorophenyl)-1H-pyrazole-4-carboxylate of the formula:

Provenance & Evidence