Hydrochloric Acid → 5-[(2-{1-[5-(4-t-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-thiophenecarboxylic acid

Participants

Reaction Steps

Methyl 5-[(2-{1-[5-(4-t-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-thiophenecarboxylate (16.0 mg, 0.035 mmol) in methanol (1.5 mL) was stirred with 1 M aqueous sodium hydroxide (176 μL, 0.176 mmol) at room temperature for 17 hours. After the stirring, 1 M hydrochloric acid (176 μL, 0.176 mmol) was added, and the precipitated solid was recovered by filtration to give 6.2 mg of the desired product as yellow crystals (yield 40%).

Provenance & Evidence