反应详情

The compound (28.58 g) obtained in Example 23-4 was dissolved in anhydrous DMF (560 ml) and added with triethylamine (20.35 ml) and ethyl bromoacetate (12.14 ml) and the whole was stirred at room temperature for 2 hours. After completion of the reaction, the solvent was distilled off. The resultant was dissolved in ethyl acetate and washed with water, followed by drying with magnesium sulfate. The solvent was distilled off. The residue was purified through silica gel column chromatography (hexane/ethyl acetate), thereby obtaining the subject compound (21.265 g) as a colorless oily substance.

1. customAfter completion of the reaction
2. distillationthe solvent was distilled off
3. dissolutionThe resultant was dissolved in ethyl acetate
4. washwashed with water
5. dry with materialby drying with magnesium sulfate
6. distillationThe solvent was distilled off
7. customThe residue was purified through silica gel column chromatography (hexane/ethyl acetate)