1-[3-tert-butyl-1-(4-methylphenyl)-1H-pyrazol-5-yl]-3-(4-methyl-3-nitrophenyl)urea → 1-(3-amino-4-methylphenyl)-3-[3-tert-butyl-1-(4-methylphenyl)-1H-pyrazol-5-yl]urea

Participants

Reaction Steps

1-[3-tert-Butyl-1-(4-methylphenyl)-1H-pyrazol-5-yl]-3-(4-methyl-3-nitrophenyl)urea (93 mg) was hydrogenated over 10% Pd/C (50% wet, 10 mg) at atmospheric pressure of hydrogen in MeOH (2 mL) for 4 hr. The catalyst was removed by filtration through Celite® pad and the filtrate was evaporated in vacuo. The residue was triturated with IPE and the precipitates produced were collected by filtration to give 1-(3-amino-4-methylphenyl)-3-[3-tert-butyl-1-(4-methylphenyl)-1H-pyrazol-5-yl]urea (74 mg).

Provenance & Evidence