反应详情

A solution of 1.0 M lithium hexa methyl disilazide (LiN(SiMe3)2) “LHMDS” (15.37 mL, 15.37 mmol) was slowly added to a stirred solution of 2-fluoro-4-iodoaniline (3.64 g, 15.37 mmol) in dry THF (100 mL) under nitrogen at −78° C. and stifling continued at −78° C. for another hour. 2,3,4,6-Tetrafluoronitrobenzene was added, and the reaction mixture was allowed to warm to room temperature and stifling continued for another 16 hours. Ethyl acetate (200 mL) was added and the organic phase was washed with water, dried over sodium sulfate and further purified by column chromatography to provide the product as a yellow solid (3.75 g, 59.24%). M−H+: 410.9. 1H NMR (DMSO, 300 MHz): 6.85 (t, 1H); 7.38 (d, 1H); 7.62 (m, 2H); 8.78 (s, 1H).

1. waitstifling continued at −78° C. for another hour
2. washthe organic phase was washed with water
3. dry with materialdried over sodium sulfate
4. customfurther purified by column chromatography