ethyl 2-methyl-2-(4-nitro-1H-pyrazol-1-yl)propanoate → ethyl 2-(4-amino-1H-pyrazol-1-yl)-2-methylpropanoate

Participants

Reaction Steps

To a solution of ethyl 2-methyl-2-(4-nitro-1H-pyrazol-1-yl)propanoate (20 g) obtained in Step F of Example 103 in ethanol (200 mL) was added 10% palladium-carbon (3.0 g), and the mixture was stirred overnight at room temperature under hydrogen atmosphere (at normal pressures). The palladium carbon was removed by filtration through Celite, and the solvent was evaporated under reduced pressure to give the title compound (17 g).

Provenance & Evidence