4-azido-1-methyl-3-nitro-1H-quinolin-2-one → 3,4-Diamino-1-methylquinolin-2(1H)-one

Participants

Reaction Steps

A solution of 4-azido-1-methyl-3-nitro-1H-quinolin-2-one (1.0 g, 4.08 mmol) in EtOH (40 mL) was hydrogenated at 1 atm over 10% Pd/C (0.781 g, 0.734 mmol) at room temperature. After 1 h, the reaction vessel was purged with nitrogen, and the catalyst was removed by filtration, rinsing with MeOH. The filtrate was concentrated in vacuo, to give 0.71 g (92%) of 3,4-diamino-1-methyl-1H-quinolin-2-one. 1H-NMR (DMSO): δ 7.82 (d, 1H, J=7.2 Hz), 7.39 (m, 2H), 7.19 (t, 1H, J=2.4 Hz), 5.48 (s, 2H), 4.35 (s, 2H), 3.63 (s, 3H). MS: calculated for C10H11N3O+H 190.1; found: 190.2.

Provenance & Evidence