Nitric Acid → HCID 18408320, compound

Participants

Reaction Steps

0.2 g (0.62 mmol) of 3-(4-chlorophenyl)-4-chloro-1-methyl-6-trifluoromethyl-2(1H)-pyridone was dissolved in 2 ml of concentrated sulfuric acid, and 0.04 g (0.64 mmol) of fuming nitric acid was added thereto under cooling with ice, followed by stirring for 1 hour. After completion of the reaction, the reaction solution was poured into ice water and extracted with ethyl acetate. The organic layer was washed with water and a saturated sodium hydrogencarbonate aqueous solution and dried over anhydrous magnesium sulfate. The organic layer was distilled off under reduced pressure, and the obtained crude crystals were washed with isopropyl ether to obtain 0.21 g (yield: 91%) of the desired product. 1H-NMR (300 MHz, CDCl3) δ value: 3.74(3H,s), 6.66(1H,s), 7.40(1H,dd), 7.61(1H,d), 7.59(1H,s), 7.82(1H,d)ppm.

Provenance & Evidence