HCID 90308693, compound → HCID 90308847, compound

Participants

Reaction Steps

10% Palladium on carbon (300 mg) was added to a solution of 2-(tert-butyl)-5-nitro-7-(1H-pyrazol-1-yl)-2H-indazole obtained in the above-described Step 2 (255 mg) in ethyl acetate (5 mL), and the reaction solution was stirred under hydrogen atmosphere at room temperature overnight. The insolubles were filtrated, and the solvent was evaporated under vacuum. Thereafter, the resultant residue was purified by column chromatography on basic silica gel (developing solvent:hexane/ethyl acetate) to obtain 2-(tert-butyl)-7-(1H-pyrazol-1-yl)-2H-indazol-5-amine as brown amorphous.

Provenance & Evidence