4-Methoxycarbonyl-3-nitrobenzhydrazide → methyl 4-[(2-{1-[5-(4-tert-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-nitrobenzoate

Participants

Reaction Conditions

Reaction Steps

1-[5-(4-tert-Butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethanone (1.149 mmol, 312.9 mg) synthesized in Synthetic Example 3, methyl 2-nitro-4-hydrazinocarbonylbenzoate (1.149 mmol, 274.8 mg) synthesized in Reference Synthetic Example 40 and p-tosylic acid monohydride (30 mol %, 59.4 mg) were dissolved in isopropyl alcohol (30 mL) and stirred under heating with reflux for 6 hours, and the reactor was cooled to 0° C. The reaction solution was filtered and dried by means of a vacuum pump to give the desired product as a yellow solid (470 mg, yield 83%).

Provenance & Evidence