反应详情

To a solution of 2-{2-amino-5-[2,2-difluoro-2-(4-fluoronaphthyl)acetylamino]-6-fluorophenyl}ethyl acetate (3.8 g, 8.8 mmol), as prepared in the preceding step, in MeOH (40 mL) and THF (20 mL) was added a solution of K2CO3 (1.68 g, 12 mmol) in water (30 mL). The mixture was stirred at room temperature for 3 hours. Additional water (50 mL) was added, and the resulting mixture was extracted with EtOAc (3×50 mL). The extracts were combined, washed with brine, dried over Na2SO4, and concentrated in vacuo to give the title compound (3.3 g, 96%) as an off white solid. 1H-NMR (400 MHz, CDCl3) δ 8.27 (d, J=8.4 Hz, 1H), 8.19 (d, J=8.2 Hz, 1H), 8.13 (s, 1H), 7.81 (m, 2H), 7.64 (m, 2H), 7.19 (t, J=8.7 Hz, 1H), 6.47 (d, J=8.7 Hz, 1H), 4.07 (s, 2H), 3.89 (t, J=5.6 Hz, 2H), 2.85 (t, J=5.5 Hz, 2H).

1. extractionthe resulting mixture was extracted with EtOAc (3×50 mL)
2. washwashed with brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated in vacuo