反应详情

Methyl 4-(aminomethyl)-benzoate hydrochloride (manufactured by Aldrich Corporation) (773 mg) was dissolved in THF (50 ml) and then gradually added with lithium aluminum hydride (300 mg) under ice-cooling. The solution was stirred at room temperature for 3 hours and then cooled with ice, followed by gradual addition of a concentrated sodium hydroxide aqueous solution until foam was not observed. Celite filtration was carried out on the solution using chloroform as a solvent and then the filtrate was concentrated and dried. The dried product was dissolved in purified water (10 ml) and THF (10 ml). After having been cooled with ice, the solution was added with N-carbethoxyphthalimide (1.26 g) and sodium carbonate (900 mg). After the mixture had been stirred at room temperature for 4 hours, THF was distilled off and chloroform was then added to the residue to carry out extraction. The organic layer was dried with anhydrous sodium sulfate and the solvent was then distilled off. Subsequently, the residue was further dried under vacuum. Next, this compound was dissolved in chloroform (20 ml) and then added with manganese dioxide (5.0 g), followed by stirring at room temperature for 3 hours. After the solution had been subjected to Celite filtration, the filtrate was concentrated and then purified through silica gel column chromatography (chloroform/methanol), thereby obtaining the subject compound (259 mg) as a white solid.

1. temperaturecooling
2. temperaturecooled with ice
3. filtrationCelite filtration
4. concentrationthe filtrate was concentrated
5. customdried
6. dissolutionThe dried product was dissolved in purified water (10 ml)
7. temperatureAfter having been cooled with ice
8. additionthe solution was added with N-carbethoxyphthalimide (1.26 g) and sodium carbonate (900 mg)
9. stirringAfter the mixture had been stirred at room temperature for 4 hours
10. distillationTHF was distilled off
11. additionchloroform was then added to the residue
12. extractionextraction
13. dry with materialThe organic layer was dried with anhydrous sodium sulfate
14. distillationthe solvent was then distilled off
15. customSubsequently, the residue was further dried under vacuum
16. dissolutionNext, this compound was dissolved in chloroform (20 ml)
17. additionadded with manganese dioxide (5.0 g)
18. stirringby stirring at room temperature for 3 hours
19. filtrationAfter the solution had been subjected to Celite filtration
20. concentrationthe filtrate was concentrated
21. custompurified through silica gel column chromatography (chloroform/methanol)