反应详情

温度

20 °C

Pyridine (7.2 g) and chromic oxide (CrO3) (4.6 g) are added in small fractions to dichloromethane (150 cc) over 10 minutes. After 15 minutes' stirring at a temperature in the region of 20° C., 2,2-ethylenedioxy-4-hydroxybutane (0.85 g, 6.4 mmol) is added quickly as a solution in dichloromethane (2 cc). After 15 minutes' stirring at 20° C., the black, viscous precipitate is separated off by filtration through silica and is washed with ether. After evaporation of the solvents, 3,3-ethylenedioxybutanal (0.59 g) is obtained (B.P.0.4 =35° C.).

1. customthe black, viscous precipitate is separated off by filtration through silica
2. washis washed with ether
3. customAfter evaporation of the solvents