反应详情

温度

55 °C

A solution of 12.7 g of sodium carbonate in 115 ml of water was added dropwise, while stirring vigorously at room temperate, to 33.8 g of (3-acetoxy-2-ethoxycarbonylbenzyl)triphenylphosphonium bromide (e.g. Eicher et al. Synthesis (1988) 525) in 264 ml of 36.5% by weight aqueous formaldehyde solution. The reaction mixture was stirred at 55° C. for 6 h and then poured into ice-water at pH 1 (hydrochloric acid) and extracted with ethyl acetate, after which the combined organic phases were dried over sodium sulfate and concentrated under reduced pressure. Further purification was carried out by chromatography on silica gel with toluene/ethyl acetate (20:1) as eluent.

1. extractionextracted with ethyl acetate
2. dry with materialafter which the combined organic phases were dried over sodium sulfate
3. concentrationconcentrated under reduced pressure
4. customFurther purification