反应详情

Following the procedure of Example 4, N-methylcarbonyl 2-nitro-5-fluoroaniline (3.1 g, 15.4 mmol), 4-trifluoromethylphenol (2.5 g, 15.4 mmol) and potassium carbonate (4.3 g, 31.0 mmol) are reacted together to give N-methylcarbonyl 2-nitro-5-(4-trifluoromethylphenoxy)aniline, 4.0 g of which is then reacted with 20% hydrochloric acid (~50 ml) to give 2-nitro-5-(4-trifluoromethylphenoxy)aniline. 2-Nitro-5-(4-trifluoromethylphenoxy)aniline (2.0 g, 6.7 mmol) is reacted with potassium hydroxide (0.4 g, 7.0 mmol) and sodium hypochlorite (19 ml of 5.2% solution, 1.0 g, 13.4 mmol) to yield 5-(4-trifluormethylphenoxy)benzo-2,1,3-oxadiazole N-oxide, m.p. 40°-42°.

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