反应详情

To a mixture of 10 g of 2,5-dimethoxyphenethyl alcohol and 10 g of chloroacetaldehyde diethyl acetal was added 14 ml of 10% hydrochloric acid and, after stirring at 80°-90° C for 1 hour, the reaction mixture was diluted with 100 ml of water and extracted with benzene. The extract was rinsed with water, dried and concentrated under reduced pressure. The residue was recrystallized from a solvent mixture of ether and petroleum ether. By the above procedure was obtained 14 g of 1-chloromethyl-5,8-dimethoxyisochroman as colorless needles, melting point: 101°-102° C.

1. extractionextracted with benzene
2. washThe extract was rinsed with water
3. customdried
4. concentrationconcentrated under reduced pressure
5. customThe residue was recrystallized from a solvent mixture of ether and petroleum ether