反应详情

温度

0 °C

In a 50 mL round-bottomed flask N1-{6-[(3-ethyl-1,3-dihydro-2-benzofuran-4-yl)oxy]-3-pyridinyl}-2-methylalaninamide (Intermediate 149, 17.2 mg, 0.050 mmol) was dissolved in Dichloromethane (3 mL) to give a pale yellow solution that was cooled at 0° C. TEA (0.035 mL, 0.252 mmol) was added followed by a dropwise addition of a solution of triphosgene (6.43 mg, 0.023 mmol) in dichloromethane (0.5 ml) and the reaction mixture was stirred at 0° C. for 20 minutes. The reaction mixture was evaporated in vacuo and the residue was purified by flash chromatography (Biotage system) on silica gel using a column SNAP 10 g and cyclohexane/ethyl acetate from 2:1 to 1:2 as eluents affording the title compound Example 45 (15.3 mg) as a white solid.

1. customto give a pale yellow solution that
2. customThe reaction mixture was evaporated in vacuo
3. customthe residue was purified by flash chromatography (Biotage system) on silica gel using a column SNAP 10 g and cyclohexane/ethyl acetate from 2:1 to 1:2 as eluents