反应详情

To a stirring solution of the product of Example 31, Step E, N-((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethoxy)-2-(4-ethyl-2-fluoro-phenylamino)-3,4-difluoro-benzamide (0.515 g, 1.213 mmol) in methanol (10 mL) and water (1 mL) was added p-toluenesulfonic acid (0.115 g, 0.607 mmol). After stirring for 17 hours the reaction mixture was partitioned between ethyl acetate and water. The organic layer was washed twice saturated sodium carbonate solution and twice with brine. The organic layer was collected, dried over sodium sulfate, filtered and concentrated in vacuo to afford N-[(R)-2,3-dihydroxy-propoxy]-2-(4-ethyl-2-fluoro-phenylamino)-3,4-difluoro-benzamide (0.440 g, 94.4%) as a clear oil/foam. 1NMR (400 MHz; CD3OD) δ 7.35 (1H, m), 6.84–6.95 (3H, m), 6.76–6.79 (1H, m), 3.91–3.94 (1H, m), 3.81–3.85 (2H, m), 3.53–3.55 (2H, m), 2.57 (2H, q, J=15.1, 7.6 Hz), 1.19 (3H, t, J=7.6 Hz); 19F-NMR (376 MHz; CD3OD) δ −132.3, −134.8, −147.3; MS(APCI+)=385; Anal. calcd/found for C18H19F3N2O4: C, 56.25/56.22; H, 4.98/4.93; N, 7.29/7.17; [α]25D −5.6° (c 10.8, EtOH).

1. customwas partitioned between ethyl acetate and water
2. washThe organic layer was washed twice saturated sodium carbonate solution
3. customThe organic layer was collected
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo