(4-Fluorophenyl)hydrazine → 5-Amino-1-(4-fluorophenyl)-4-(3-nitrobenzoyl)pyrazole

Participants

Reaction Steps

A mixture of 4-fluorophenylhydrazine (2.24 g, 15.57 mmol) and 2-(3-nitrobenzoyl)-3-phenylaminoacrylonitrile (4.15 g, 14.16 mmol) in ethanol (50 ml) was heated at reflux under nitrogen atmosphere. After 1 h, the reaction mixture was cooled to room temperature and stirred for an additional 3 h. The solid was filtered and dried to give 5-amino-1-(4-fluorophenyl)-4-(3-nitrobenzoyl)pyrazole (4.5 g) as a solid.

Provenance & Evidence