Hydrochloric Acid → HCID 58851646, compound

Participants

Reaction Steps

To a mixture of 3-hydrazinobenzoic acid ethyl ester (4.5 g, 25.0 mmol) and commercially available 3-oxo-3-phenylpropionitrile (5.5 g, 37.5 mmol) in ethanol (50 mL) was added conc. HCl (5 mL). The resulting mixture was heated to reflux for 3 h. After removal of the solvent, the residue was washed with Et2O to afford ethyl 3-(5-amino-3-phenyl-1H-pyrazol-1-yl)benzoate (7 g, 2% yield, 2 steps) which was used in the next reaction without further purification.

Provenance & Evidence