反应详情

温度

12.5 °C

Anisaldehyde (40 g) and trimethylorthoformate (48.25 ml) were added to MeOH (60 ml) at 20-25° C. and the mixture was cooled to 10-15° C. Conc. HCl (0.26 ml) was then added to the mixture at 10-15° C. and was warmed to 20-25° C. followed by stirring at the same temperature for 16-18 hours. 5% aqueous KOH (40 ml) was added to the reaction mixture at 20-25° C. in 10 min and further stirred for 10 minutes. The reaction mixture was extracted with hexane (2×200 ml) and the combined organic layer was washed with DM water (200 ml). The organic layer was concentrated below 40° C. to obtain title compound (51.0 g, 95.2%).

1. temperaturewas warmed to 20-25° C.
2. stirringfurther stirred for 10 minutes
3. extractionThe reaction mixture was extracted with hexane (2×200 ml)
4. washthe combined organic layer was washed with DM water (200 ml)
5. concentrationThe organic layer was concentrated below 40° C.