反应详情

In a 2 L flask, 72 g of veratrole was dissolved in 300 g of tetrahydrofuran and 155.3 g of butyllithium in toluene was added at temperatures from −10° C. to over 30° C. The mixture was stirred from 1-4 hours at ambient temperature. Then 40 g of 4-pyridinecarboxaldehyde (9) in 180 mL of toluene was added around ambient temperature. The reaction mixture was stirred from 30 minutes to 5 hours. The solution was then cooled to around 5° C. and quenched with 200 mL of water. The phases were separated and the organic phase was distilled to remove the tetrahydrofuran. The residue was taken up in toluene at −5° C. The 4-[1-hydroxy-1-(2,3-dimethoxyphenyl)methyl]pyridine (10) was collected by filtration and washed with 60 g of toluene.

1. stirringThe reaction mixture was stirred from 30 minutes to 5 hours
2. temperatureThe solution was then cooled to around 5° C.
3. customquenched with 200 mL of water
4. customThe phases were separated
5. distillationthe organic phase was distilled
6. customto remove the tetrahydrofuran
7. customwas taken up in toluene at −5° C
8. filtrationThe 4-[1-hydroxy-1-(2,3-dimethoxyphenyl)methyl]pyridine (10) was collected by filtration
9. washwashed with 60 g of toluene