Methyl 6-amino-5-nitropyridine-3-carboxylate → Methyl 5,6-diaminopyridine-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a suspension of 6-Amino-5-nitro-nicotinic acid methyl ester (3) (5 g, 25 mmol) in MeOH (150 ml) was added Raney Ni. The mixture was vacuum purged with H2 5 times and heated at 80° C. under H2 atmosphere for 4 h. The solution was filtered through celite and concentrated in vacuo to give the product as a brown solid (3.2 g, 19 mmol, 76%) that was used without further purification. TLC of the product in DCM/MeOH (19:1) indicated a more polar spot at Rf=0.026.

Provenance & Evidence