反应详情

To a solution of 4-(4,4,5,5-tetramethyl-[1,3]dioxolan-2-yl)-phenol (10.0 g, 45.5 mmol) and Cs2CO3 (23.5 g, 68.25 mmol) in DMF (60 mL) was added ethyl α-bromoacetate (11.6 g, 68.25 mmol). The mixture was stirred at room temperature for 24 hours, then diluted with ethyl acetate, washed with water, dried over Na2SO4. After filtration and evaporation, the residue was dried under high vacuum to provide [4-(4,4,5,5-tetramethyl-[1,3]dioxolan-2-yl)-phenoxy]-acetic acid ethyl ester (12.52 g, 90% yield) as an oil.

1. washwashed with water
2. dry with materialdried over Na2SO4
3. filtrationAfter filtration and evaporation
4. customthe residue was dried under high vacuum