5-Nitro-2-oxindole → 5-Amino-2-oxindole

Participants

Reaction Steps

To a solution of 5-nitro-oxindole (25 g) in 120 mL of dimethylacetamide in a Parr bottle was added 10% Pd/C (0.5 g). The mixture was hydrogenated (40 psi H2) for 16 h. The catalyst was removed by filtration and the filtrate was diluted with ether (2 L) to provide 5-amino-oxindole (10.5 g; 50%).

Provenance & Evidence