Nitric Acid → HCID 15457055, compound

Participants

Reaction Steps

1.0 g (3.3 mmol) of 3-(4-chloro-2-fluorophenyl)-1-methyl-6-trifluoromethyl-2(1H)-pyridone was dissolved in 10 ml of concentrated sulfuric acid, and 0.25 g (4.0 mmol) of fuming nitric acid was dropwise added thereto under cooling with ice, followed by stirring for 1 hour. This reaction solution was poured into ice water and extracted with ethyl acetate. After washing with water and a saturated sodium hydrogencarbonate aqueous solution, the organic layer was dried over anhydrous magnesium sulfate. Ethyl acetate was distilled off under reduced pressure, and then, the obtained residue was purified by silica gel column chromatography to obtain 1.1 g (yield: 96%) of the desired product. Melting point: 139-140° C.

Provenance & Evidence