反应详情

5-Amino-6-fluoro-4-methoxy-2-methylbiphenyl-3-carbonitrile (I-236) (300 mg, 1.17 mmol) was dissolved in pyridine (3 ml), and under nitrogen atmosphere at 0° C., pivaloyl chloride (433 μl, 3.51 mmol) was dropwise added. After stirring at roam temperature for 20 hours, aqueous 1 M hydrochloric acid solution was added to the reaction liquid at 0° C. The solution was extracted twice with ethyl acetate. The organic layer was washed with saturated brine, then dried over anhydrous sodium sulfate.

1. extractionThe solution was extracted twice with ethyl acetate
2. washThe organic layer was washed with saturated brine
3. dry with materialdried over anhydrous sodium sulfate