反应详情

温度

65 °C

(8E,12E,14E)-7-Acetoxy-3,16,21-tris(1-ethoxyethoxy)-6-hydroxy-6,10,12,16,20-pentamethyl-18,19-epoxytricosa-8,12,14-trien-11-olide (34 mg, 44 μmol) obtained in Example 3 and 1,8-bis(N,N-dimethylamino)naphthalene (57 mg, 266 μmol) were dissolved in toluene (2 mL). Methyl trifluoromethanesulfonate (22 mg, 133 μmol) was added to this solution, and the reaction mixture was stirred at 65° C. for 11 hours. After removing the precipitate by filtration, the reaction mixture was diluted with ethyl acetate, and an aqueous solution of ammonium chloride was added, followed by vigorous stirring for 5 minutes. The organic layer was washed with a saturated aqueous solution of sodium bicarbonate and brine, dried over anhydrous magnesium sulfate, and concentrated. The resulting residue was purified by silica gel column chromatography (Kanto silica gel 60N spherical, neutral, 40 to 100 μm; hexane:ethyl acetate=1:1) to give (8E,12E,14E)-7-acetoxy-3,16,21-tris(1-ethoxyethoxy)-6-methoxy-6,10,12,16,20-pentamethyl-18,19-epoxytricosa-8,12,14-trien-11-olide (14 mg) as a colorless oil.

1. customAfter removing the precipitate
2. filtrationby filtration
3. additionthe reaction mixture was diluted with ethyl acetate
4. additionan aqueous solution of ammonium chloride was added
5. stirringby vigorous stirring for 5 minutes
6. washThe organic layer was washed with a saturated aqueous solution of sodium bicarbonate and brine
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationconcentrated
9. customThe resulting residue was purified by silica gel column chromatography (Kanto silica gel 60N spherical, neutral, 40 to 100 μm; hexane:ethyl acetate=1:1)