反应详情

To a solution of LDA [prepared from iPr2NH (0.15 mL, 1.070 mmol) and n-BuLi (0.52 mL, 0.936 mmol)] in THF (3 mL) at −78° C. under Ar was added 1-[4-(1-phenyl-1-ethynyl-methylene)-piperidin-1-yl]-2-(4,7-dimethoxy-6-azaindol-3-yl)-ethane-1,2-dione (0.160 g, 0.373 mmol). The solution was allowed to stir for 30 min and then a large excess of powdered dry ice was added directly into the flask. The mixture was allowed to warm to room temperature overnight and was then quenched with 10% aqueous HCl. The mixture was extracted with EtOAc (×3) and the combined organic layers were washed (H2O, brine), dried (Na2SO4) and concentrated. The residue was purified by preparative HPLC to afford the title compound as a colorless solid (0.026 g, 15%):

1. customwas then quenched with 10% aqueous HCl
2. extractionThe mixture was extracted with EtOAc (×3)
3. washthe combined organic layers were washed (H2O, brine)
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated
6. customThe residue was purified by preparative HPLC