Bromoacetonitrile → HCID 14837015, compound

Diisopropylethylamine (0.82 ml, 4.7 mmol) and 0.30 ml (4.3 mmol) of bromoacetonitrile were added consecutively with stirring at ambient temperature to 3-fluoro-5-(1,1.2,2-tetrafluoroethoxy)-2-pyridinol (0.90 g, 3.98 mmol) in 5 ml of methylene chloride and the mixture allowed to react overnight. It was then diluted with 25 ml of methylene chloride, extracted with 25 ml of water and with dilute aqueous sodium carbonate, dried over sodium sulfate, and concentrated by evaporation under reduced pressure to obtain the title compound as a solid. This was recrystallized from toluene to obtain 0.92 g (86 percent of theory) of purified material melting at 75.5-77° C. The proton nmr spectrum was consistent with the assigned structure.