反应详情

A solution of the compound (1.37 g) obtained in Example 41 in anhydrous dimethylformamide (DMF; 60 ml) was added to a suspension of sodium hydride (60% dispersion in oil; 0.30 g) in DMF(10 ml) at room temperature. After stirring for 15 minutes, a solution of methyl bromoacetate (0.72 ml) in DMF (10 ml) was added to the reaction mixture. The reaction mixture was stirred for 10 minutes at room temperature, followed by addition of water and extraction with three portions of ethyl acetate. The organic layer was washed with water and saturated aqueous solution of sodium chloride and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure and the residue was crystallized from ethyl acetate to yield 1.58 g (90%) of the titled compound as a yellow powder.

1. stirringThe reaction mixture was stirred for 10 minutes at room temperature
2. washThe organic layer was washed with water and saturated aqueous solution of sodium chloride
3. dry with materialdried over anhydrous sodium sulfate
4. distillationThe solvent was distilled off under reduced pressure
5. customthe residue was crystallized from ethyl acetate