反应详情

A stirring mixture of 100 g of benzyloxyacetaldehyde diethyl acetal, 500 ml of tetrahydrofuran and 400 ml of 2N sulfuric acid is heated at reflux temperature for 45 minutes. The resulting solution is cooled to room temperature, concentrated in vacuo to 400 ml volume and diluted with 1000 ml of chloroform. The organic layer is washed with water, cold saturated sodium bicarbonate, saturated sodium chloride and dried. The filtrate is evaporated in vacuo to give the product as an oil. The crude oil is purified by Kugelrohr distillation (bath temperature 100° C.) to give 59.0 g of the desired product as a colorless oil.

1. temperatureis heated
2. temperatureat reflux temperature for 45 minutes
3. concentrationconcentrated in vacuo to 400 ml volume
4. additiondiluted with 1000 ml of chloroform
5. washThe organic layer is washed with water, cold saturated sodium bicarbonate, saturated sodium chloride
6. customdried
7. customThe filtrate is evaporated in vacuo