4-Fluoro-2-methyl-5-nitrobenzoic acid → 5-Amino-4-fluoro-2-methylbenzoic acid

Participants

Reaction Steps

To a solution of 2-methyl-5-nitro-4-fluorobenzoic acid (1.77 g, 8.9 mmol, for preparation see Coll. Czech. Chem. Commun. 1977, 42, 2001) in ethanol (15 mL) was added 10% Pd/C (50 mg) and the mixture was subjected to hydrogenation under 30 psi of pressure. After 3 h, hydrogen was removed and the mixture was filtered and the filtrate was concentrated in vacuo to afford 2-methyl-5-amino-4-fluorobenzoic acid (1.45 g, 97%). LC/MS; (M+H)+=170.

Provenance & Evidence