1,3,5-Trimethyl-4-nitro-1H-pyrazole → 1,3,5-trimethyl-1H-pyrazol-4-amine

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Reaction Steps

The compounds from (b) above (2.3 g; 0.014 moles) was catalytically hydrogenated using Raney nickel (1 g) in methanolic ammonia (100 mL) under a hydrogen atmosphere at 50 psi. The catalyst was filtered and the solution concentrated in vacuo, leaving a residue that was triturated several times with ethyl ether. The decanted solvent was concentrated to dryness, leaving a pale red solid. Yield: 1.3 g (70%).

Provenance & Evidence