3,3-Dimethyl-6-nitro-1,3-dihydro-2H-indol-2-one → 6-Amino-3,3-dimethyl-1,3-dihydro-2H-indol-2-one

Participants

Reaction Conditions

Reaction Steps

Palladium on activated carbon (10%, 129 mg, 121 μmol) was added to a solution of 3,3-dimethyl-6-nitroindolin-2-one (J.-P. Hölck et al., 1987, U.S. Pat. No. 4,666,923 A1; 500 mg, 2.42 mmol) in ethyl acetate (100 ml). The mixture was stirred at 70° C. under an hydrogen atmosphere (balloon) for 48 hours. The catalyst was filtered off, washed with ethyl acetate and the solvent was evaporated. The title compound was obtained as orange powder (427 mg).

Provenance & Evidence