Nitric Acid → HCID 19012214, compound

Participants

Reaction Steps

To a mixture of 2,6-diamino-4-trifluoromethylpyridine (173 mg) in H2SO4 (3 mL) at 0° C. was added HNO3 (0.048 mL, d=1.40). The stirred mixture was sequentially warmed to RT, aged 1.5 hours, poured onto 50 g ice, neutralized with NH4OH, extracted with EtOAc, filtered through 20 g SiO2 (washed with EtOAc until yellow color eluted), and concentrated to give 70 mg of 2,6-diamino-3-nitro-4-trifluoromethylpyridine as a yellow solid. A 1:1 THF/MeOH solution of the nitro compound (65 mg) was hydrogenated (1 atm H2, Ra-Ni, 16 hours at RT), filtered, concentrated, and converted to the title compound by the method outlined in Example 21.

Provenance & Evidence