反应详情

N-(4-Fluoro-3-nitrophenyl)acetamide (1.15 g, 5.84 mmol) and [(4,4-difluorocyclohexyl)methyl]amine hydrochloride (1.30 g, 7.59 mmol) were stirred in 30 mL of EtOH containing TEA (2.40 mL, 17.5 mmol) at 80° C. for 48 h. The solvent was evaporated. The residue was dissolved in EtOAc and washed with aqueous 5% KHSO4 solution, saturated aqueous NaHCO3 solution, saturated aqueous NaCl solution and dried over anhydrous Na2SO4. The product was crystallized from EtOAc. The left over mother liquor was purified by flash chromatography on silica gel using hexane/acetone (2:1) as eluent. Yield: 1.50 g (78%); 1H NMR (400 MHz, CDCl3) δ 1.33-1.47 (m, 2 H), 1.66-1.77 (m, 2 H), 1.77-1.86 (m, 1 H), 1.89-1.93 (m, 1 H), 1.93-1.97 (m, 1 H), 2.10-2.17 (m, 2 H), 2.18 (s, 3 H), 3.23 (dd, J=6.74, 5.76 Hz, 2 H), 6.83 (d, J=9.37 Hz, 1 H), 7.15 (s, 1 H), 7.80 (dd, J=9.18, 2.54 Hz, 1 H), 8.09 (d, J=2.54 Hz, 2 H).

1. customThe solvent was evaporated
2. dissolutionThe residue was dissolved in EtOAc
3. washwashed with aqueous 5% KHSO4 solution, saturated aqueous NaHCO3 solution, saturated aqueous NaCl solution
4. dry with materialdried over anhydrous Na2SO4
5. customThe product was crystallized from EtOAc
6. waitThe left over mother liquor
7. customwas purified by flash chromatography on silica gel