反应详情

To a solution of (1RS,2SR)-2-amino-3-(4-tert-butoxyphenyl)-1-(3-chlorophenyl)propan-1-ol (300 mg, 0.90 mmol) in acetonitrile (20 ml) were added 4-fluoronaphthalenecarboxylic acid (171 mg, 0.90 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (258 mg, 1.35 mmol) and 1-hydroxybenzotriazole hydrate (138 mg, 0.90 mmol), and the mixture was stirred overnight at room temperature. The reaction solution was diluted with water (100 ml) and extracted with ethyl acetate (100 ml×2). The extract was washed successively with water and saturated brine, dried (anhydrous magnesium sulfate) and evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1-2:1). Recrystallization from ethyl acetate-hexane gave the objective substance (278 mg, 61%).

1. extractionextracted with ethyl acetate (100 ml×2)
2. washThe extract was washed successively with water and saturated brine
3. dry with materialdried (anhydrous magnesium sulfate)
4. customevaporated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1-2:1)
6. customRecrystallization from ethyl acetate-hexane
7. customgave the objective substance (278 mg, 61%)