反应详情

The solution of 32.7 g of 2-methyl-5-hydroxy-pyridine in 300 ml of dimethylformamide is added to a suspension of 12.8 g of sodium hydride (57% mineral oil dispersion) in 150 ml of dimethylformamide, with stirring. Then the mixture is heated to 100° and maintained at 100° for 18 hours. After that, the mixture is cooled to room temperature and to the cooled mixture is added a solution of 49.8 g of benzyl chloride in 100 ml of dimethylformamide over a period of 30 minutes. The mixture is then refluxed for 7 hours, cooled and then evaporated to a residue. The residue is partitioned between water and ether, the layers are separated and the water layer extracted with ether. The ether layer is combined with ether extract, dried over sodium sulfate, filtered and the ethereal filtrate is distilled off. The residue is distilled to yield 5-benzyloxy-2-methyl-pyridine, boiling at 100°-102°/0.02 mm/Hg.

1. temperatureThen the mixture is heated to 100°
2. temperaturemaintained at 100° for 18 hours
3. temperatureThe mixture is then refluxed for 7 hours
4. temperaturecooled
5. customevaporated to a residue
6. customThe residue is partitioned between water and ether
7. customthe layers are separated
8. extractionthe water layer extracted with ether
9. extractionextract
10. dry with materialdried over sodium sulfate
11. filtrationfiltered
12. distillationthe ethereal filtrate is distilled off
13. distillationThe residue is distilled