N-Ethyl-4-nitro-1-oxo-1lambda~5~-pyridin-3-amine → N3-ethylpyridine-3,4-diamine

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Reaction Steps

A solution of 3-ethylamino-4-nitro-pyridine 1-oxide (1.5 g, 8.19 mmol), in methanol (30 mL) is hydrogenated over 10% Pd—C (1.5 g) at 50-60 psi for 48 h. The catalyst is removed by filtration through a pad of celite, and the solvent is evaporated under vacuum to afford N-Ethyl-pyridine-3,4-diamine as an white solid. 1H NMR (300 MHz, CDCl3): δ 7.59 (s, 1H), 7.57 (d, J=2.4 Hz, 1H), 6.56 (d, J=5.4 Hz, 1H), 3.20 (t, J=7.2 Hz, 2H), 1.29 (t, J=7.2 Hz, 3H), m/z 138 [M+l]

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