(-)-Ethyl (3-methyl-4-nitro-2-oxo-2,3-dihydro-1H-indol-3-yl)acetate → (+/-)-Ethyl (4-amino-2-oxo-2,3-dihydro-1H-indol-3-yl)acetate

Participants

Reaction Steps

A mixture of (±)-ethyl (3-methyl-4-nitro-2-oxo-2,3-dihydro-1H-indol-3-yl)acetate from Step A (2.56 g, 9.69 mmol) and 10% Pd/C (500 mg) was stirred vigorously in MeOH (50 mL) under an atmosphere of hydrogen (ca. 1 atm). After 16 h, the mixture was filtered through a pad of Celite, washing with MeOH, and the filtrate was concentrated in vacuo to give the title compound. MS: m/z=235 (M+1).

Provenance & Evidence