反应详情

A solution of 3-(3-fluoro-4-(pyrrolo[2,1-f][1,2,4]triazin-4-yloxy)phenylamino)-3-oxopropanoic acid (18 mg, 0.55 mmol, Compound B of Example 23), BOP reagent (36 mg, 0.082 mmol), 4-methylmorpholine (30 μL, 0.27 mmol), and 4-fluoroaniline (5.2 μL, 0.055 mmol) in dimethylformamide (0.5 mL) was stirred at room temperature for 16 h. The reaction was diluted with EtOAc (4 mL) and washed with water, 10% aq LiCl solution, and brine (1×3 mL each). The organic solution was dried over anhydrous Na2SO4 and then concentrated in vacuo. Purification by flash chromatography on silica gel (SiO2, EtOAc/Hexane 7:3) gave the desired compound as a white solid. The product was lyophilized with acetonitrile/water to give the title compound (14 mg, 61%) as a white powder. 1H NMR (CDCl3) δ 9.28 (br s, 1H), 8.64 (br s, 1H), 7.89 (s, 1H), 7.73 (dd, 1H, J=2.5, 1.5 Hz), 7.69 (dd, 1H, J=11.6, 1.9 Hz), 7.42 (m, 3H), 7.21 (m, 1H), 6.97 (m, 3H), 6.80 (dd, 1H, J=4.5, 2.6 Hz), 3.49 (s, 2H); MS(ESI+) m/z 424.1 (M+H)+.

1. washwashed with water, 10% aq LiCl solution, and brine (1×3 mL each)
2. dry with materialThe organic solution was dried over anhydrous Na2SO4
3. concentrationconcentrated in vacuo
4. customPurification by flash chromatography on silica gel (SiO2, EtOAc/Hexane 7:3)