反应详情

A DMF (120 ml) suspension of ethyl 2-(4-benzyloxyphenyl)-2-ethoxycarbonylacetate (12.0 g, 35.1 mmols), 1-bromo-6-bromomethyl-2,3,4,5-tetramethoxybenzene (16.9 g, 45.6 mmols) and potassium carbonate (14.5 g, 105 mmols) was stirred at room temperature for 6 hours, and then 1-bromo-6-bromomethyl-2,3,4,5-tetramethoxybenzene (2.60 g, 7.02 mmols) was added thereto stirring was continued at room temperature for further 6 hours. Water was added to the reaction mixture, which was then extracted with diethyl ether. The organic layer was washed with water and a saturated aqueous sodium chloride solution, and then dried. The solvent was evaporated out in vacuo, and the resulting crude product was purified by recrystallization (from hexane-ethyl acetate) to obtain the entitled compound (11.0 g) as crystals.

1. stirringthereto stirring
2. waitwas continued at room temperature for further 6 hours
3. extractionwas then extracted with diethyl ether
4. washThe organic layer was washed with water
5. dry with materiala saturated aqueous sodium chloride solution, and then dried
6. customThe solvent was evaporated out in vacuo
7. customthe resulting crude product was purified by recrystallization (from hexane-ethyl acetate)