Hydrochloric Acid → HCID 72359925, compound

Participants

Reaction Steps

To methyl 4-[(2-{1-[4-hydroxy-1-methyl-5-(4-n-propylphenyl)-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]benzoate (0.166 mmol, 72.2 mg), methanol was added, and 1 M aqueous sodium hydroxide (5 eq., 0.831 mL) was added at room temperature. After 10 minutes of stirring at room temperature and 2 hours of stirring at 60° C., the reactor was cooled to room temperature, and 1 M hydrochloric acid (5 eq., 0.831 mL) and water were added. The precipitated solid was recovered by filtration, washed with water and dried by means of a vacuum pump, and the residue was further purified by silica gel thin layer chromatography (chloroform/methanol=10/1). After addition of chloroform/n-hexane, the precipitated solid was recovered by filtration and dried to give the desired product as a yellow solid (47.1 mg, yield 67%).

Provenance & Evidence