反应详情

A mixture of 9.06 g of 2,5-difluoro-nitrobenzene (60 mmol) and 12.64 g of 2-amino-N-isopropyl-N-(4-methoxy-phenyl)-acetamide, prepared as in Part A, (60 mmol, 1.0 equiv) were combined in 225 mL of 2:1 ethanol/water and heated to reflux under nitrogen and stirred vigorously overnight (approx. 16 hrs.). The resulting slurry is cooled to ambient temperature, filtered and washed with 2:1 water/ethanol. The wet solid is dissolved in methylene chloride, dried over anhydrous sodium sulfate, and evaporated in vacuo. The residue is triturated with hexane, filtered and washed with hexane. The product is dried under high vacuum to provide 9.32 g of 2-(4-Fluoro-2-nitro-phenylamino)-N-isopropyl-N-(4-methoxy-phenyl)-acetamide as an orange solid: 1H NMR (300 MHz, CDCl3) δ7.89 (dd, 1H, J=3.1, 9.3), 7.12 (m, 3H), 6.99 (m, 2H), 6.35 (dd, 1H, J=4.8, 9.2), 5.03 (m, 1H), 3.89 (s, 3H), 3.57 (s, 2H), 1.09 (d, 6H, J=6.8); low resolution MS (ESI)m/e 362 (MH+).

1. temperatureheated
2. temperatureto reflux under nitrogen
3. filtrationfiltered
4. washwashed with 2:1 water/ethanol
5. dissolutionThe wet solid is dissolved in methylene chloride
6. dry with materialdried over anhydrous sodium sulfate
7. customevaporated in vacuo
8. customThe residue is triturated with hexane
9. filtrationfiltered
10. washwashed with hexane
11. customThe product is dried under high vacuum