Nitric Acid → 2,2,7-trifluoro-6-nitro-2H-benzo[b][1,4]oxazin-3(4H)-one

Participants

Reaction Conditions

Reaction Steps

2,2,7-trifluoro-2H-benzo[b][1,4]oxazin-3(4H)-one (2.5 g, 12.31 mmol) was dissolved in sulfuric acid (40 ml, 750 mmol). The reaction mixture was cooled to 0-5° C. Slowly nitric acid (1.761 ml, 39.7 mmol) was added dropwise and the temperature was maintained between 0-5° C. The reaction mixture was stirred for 30 min at this temperature. Then the reaction mixture was added dropwise to vigorously stirred cold water. A solid was formed, which was extracted with dichloromethane. The combined extracts were dried over Na2SO4, and concentrated to yield 2.56 g of the title compound as a brown solid.

Provenance & Evidence