Hydrazine hydrate (1:1) → tert-butyl (3-amino-1-methyl-1H-pyrazol-4-yl)carbamate

Participants

Reaction Steps

To a solution of tert-butyl (3-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)-1-methyl-1H-pyrazol-4-yl)carbamate (1.8 g) in methanol (26 mL) was added hydrazine monohydrate (0.38 mL), and the mixture was stirred at room temperature for 3 hr. The reaction mixture was concentrated, and the residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (1.1 g).

Provenance & Evidence