反应详情

To a solution of (R)-1-(3,4,5-trifluorophenyl)ethanol (3.6 g) and diphenylphosphoric azide (6.0 ml) in toluene (70 ml), 1,8-diazabicyclo[5,4,0]undec-7-ene (4.1 ml) was added dropwise under ice-cooling. The reaction solution was stirred at the same temperature for one hour and at room temperature overnight. Water was added to the reaction solution, and the organic layer was separated. Then, the aqueous layer was subjected to extraction with toluene again. The organic layers were combined and sequentially washed with 1 N hydrochloric acid, water, a saturated sodium bicarbonate solution, and brine. The organic layers were dried over anhydrous magnesium sulfate, and then the solvent was evaporated under reduced pressure. The resulting residue was purified by silica gel column chromatography (heptane:ethyl acetate=49:1) to obtain 858 mg of the title compound.

1. temperaturecooling
2. customthe organic layer was separated
3. extractionThen, the aqueous layer was subjected to extraction with toluene again
4. washsequentially washed with 1 N hydrochloric acid, water
5. dry with materialThe organic layers were dried over anhydrous magnesium sulfate
6. customthe solvent was evaporated under reduced pressure
7. customThe resulting residue was purified by silica gel column chromatography (heptane:ethyl acetate=49:1)