HCID 18408338, compound → HCID 15457076, compound

Participants

Reaction Steps

10.3 g (28.6 mmol) of 3-(2-chloro-4-methoxy-5-nitrophenyl)-1-methyl-6-trifluoromethyl-2(1H)-pyridone was dissolved in 150 ml of dichloromethane, and 30 ml (90 mmol) of a 3N boron tribromide/dichloromethane solution was dropwise added thereto under cooling in a dry ice-acetone bath. The temperature was raised to room temperature, followed by stirring for 2 hours. Then, the mixture was poured into ice water and extracted with dichloromethane. The organic layer was washed with water and a saturated sodium hydrogencarbonate aqueous solution and then dried over anhydrous magnesium sulfate. The organic layer was distilled off under reduced pressure to obtain 8.0 g (yield: 80%) of the desired product.

Provenance & Evidence