反应详情

温度

120 °C

20.0 g (53.0 mol) of triphenyl(t-butoxycarbonylimino)phosphorane was suspended in 80 mL of toluene, mixed with 8.84 g (60.0 mmol) of anhydrous chloral and heated at 120° C. for 4 hours under reflux. After cooling to room temperature, 300 mL of hexane was added, and the resulting white solid was separated by filtration. The filtrate was concentrated under reduced pressure. The resulting brown liquid was dissolved in 200 mL of chloroform, and simultaneous addition of 3.74 g (50.0 mmol) of potassium carbonate in 20 mL of ice-cold water and 4.94 g (15 mmol) of OXONE (2KHSO5.KHSO4.K2SO4, supplied from Du Pont) in 40 mL of ice-cold water and 1 hour of stirring under cooling with ice were repeated three times. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2KHSO5.KHSO4.K2SO4, supplied from Du Pont) and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, 11.2 g (150 mmol) of potassium carbonate in 60 mL of ice-cold water and 14.8 g (45 mmol) of OXONE in 120 mL of ice-cold water were added simultaneously, and the reaction solution was stirred for 1 hour of stirring under cooling with ice. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, the chloroform layer was dried over anhydrous sodium sulfate and filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography using hexane-ethyl acetate {100:0 (volume ratio, hereinafter the same applies) to 80:20} as the eluent to give 10.3 g of the desired product as a pale yellow oil.

1. temperatureunder reflux
2. temperatureAfter cooling to room temperature
3. customthe resulting white solid was separated by filtration
4. concentrationThe filtrate was concentrated under reduced pressure
5. dissolutionThe resulting brown liquid was dissolved in 200 mL of chloroform
6. temperatureunder cooling with ice
7. customAfter removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2KHSO5
8. custom1 hour
9. stirringof stirring
10. temperatureunder cooling with ice
11. customAfter removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour
12. stirringof stirring
13. temperatureunder cooling with ice
14. additionwere added simultaneously
15. stirringthe reaction solution was stirred for 1 hour
16. stirringof stirring
17. temperatureunder cooling with ice
18. customAfter removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE
19. additionwere simultaneously added
20. stirringthe reaction solution was stirred for 1 hour
21. stirringof stirring
22. temperatureunder cooling with ice
23. customAfter removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE
24. additionwere simultaneously added
25. stirringthe reaction solution was stirred for 1 hour
26. stirringof stirring
27. temperatureunder cooling with ice
28. customAfter removal of the aqueous layer
29. dry with materialthe chloroform layer was dried over anhydrous sodium sulfate
30. filtrationfiltered
31. concentrationthe filtrate was concentrated under reduced pressure
32. customThe resulting residue was purified by silica gel column chromatography