反应详情

A solution of diisopropyl azodicarboxylate (7.41 g, 36.6 mmol) in THF (23 mL) was added dropwise to a suspension of 3-(tert-butyldimethylsiloxymethyl)-benzyl alcohol (9.25 g, 36.6 mmol), phthalimide (5.39 g, 36.6 mmol) and tripheylphosphine (9.61 g, 36.6 mmol) in THF (50 mL) at room temperature, and the resulting mixture was stirred for 3 hours. The reaction mixture was concentrated under reduced pressure, and the residue was diluted with diethyl ether and stirred at room temperature for 30 minutes. The reaction solution was filtered and the filtrate was concentrated under reduced pressure. The concentration residue was purified by the use of a silica gel column (silica gel 500 mL; hexane−ethyl acetate=10/1−7/1) to obtain the title compound (11.93 g, 85%) as a white solid.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. additionthe residue was diluted with diethyl ether
3. stirringstirred at room temperature for 30 minutes
4. filtrationThe reaction solution was filtered
5. concentrationthe filtrate was concentrated under reduced pressure
6. customThe concentration residue was purified by the use of a silica gel column (silica gel 500 mL; hexane−ethyl acetate=10/1−7/1)