反应详情

To a solution of Z-Tyr(3-tBu)-OMe (3.30 g, 8.57 mmol) in THF (200 ml), diisobutyl aluminum hydride (1.0 M toluene solution) (42.9 ml, 42.9 mmol) was added dropwise at −78° C. over 15 min. After stirring for 1 hour, the mixture was mixed with methanol and a saturated aqueous NaHCO3 solution and extracted with ethyl acetate. The organic layer was washed with water and then with saturated brine, dried over anhydrous magnesium sulfate and evaporated to remove the solvent under reduced pressure; the thus obtained residue was subjected to silica gel column chromatography (developing solvent: ethyl acetate:n-hexane=1:2), giving the titled compound (2.18 g, 72%).

1. extractiona saturated aqueous NaHCO3 solution and extracted with ethyl acetate
2. washThe organic layer was washed with water
3. dry with materialwith saturated brine, dried over anhydrous magnesium sulfate
4. customevaporated
5. customto remove the solvent under reduced pressure