反应详情

To a solution of 2-(4-bromo-3-formyl-phenoxy)-6-[(2-hydroxy-ethyl)-methyl-amino]-nicotinonitrile (9, 8 g, 21.3 mmol) in THF (anhydrous, 100 mL) were added TBDMS-Cl (3.21 g, 21.3 mmol) and Et3N (3 mL, 21.3 mmol). The solution was stirred at room temperature for 2 days. The solution was filtered and concentrated in vacuo. Purification was accomplished by silica gel chromatography, eluting with 5%-50% EtOAc/hexanes gradient, to afford 10 g (85% yield) of the title compound.

1. filtrationThe solution was filtered
2. concentrationconcentrated in vacuo
3. customPurification
4. washeluting with 5%-50% EtOAc/hexanes gradient