反应详情

Addition reaction was carried out by mixing 98 g of zinc powder, 247 g of α-bromo-γ-butyrolactone, 122 g of 5-norbornene-2-carbaldehyde, and 2 kg of dry tetrahydrofuran and heating the mixture under reflux for 10 hours in a nitrogen atmosphere. The reaction mixture was cooled, to which dilute hydrochloric acid was added for neutralization and hexane was added for extraction. The organic layer was washed with water, dried over anhydrous sodium sulfate, filtered, and concentrated in vacuum. Purification by silica gel column chromatography yielded 148 g (yield 71%) of α-[hydroxy(5-norbornen-2-yl)methyl]-γ-butyrolactone.

1. additionAddition reaction
2. temperatureheating the mixture
3. temperatureunder reflux for 10 hours in a nitrogen atmosphere
4. additionwas added for extraction
5. washThe organic layer was washed with water
6. dry with materialdried over anhydrous sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuum
9. customPurification by silica gel column chromatography