1-(Tert-butyl)-4-nitro-1H-pyrazole → 1-(tert-butyl)-1H-pyrazol-4-amine

Participants

Reaction Steps

A mixture of 1-tert-butyl-4-nitro-1H-pyrazole (20 g, 118 mmol) and Pd/C (10%, 2 g, 1.9 mmol) in MeOH (100 mL) was hydrogenated under 1 atmosphere of hydrogen at RT for 16 h. The reaction mixture was filtered and the filtrate was concentrated in vacuo to give 1-tert-butyl-1H-pyrazol-4-ylamine (15 g, 93%). 1H NMR (400 MHz, DMSO-d6): δ 7.08 (s, 1 H), 6.90 (s, 1H), 3.70 (s, 2 H), 1.41 (s, 9 H); MS (ESI) m/z: 140.1 [M+H]+.

Provenance & Evidence