反应详情

To a suspension of sodium hydride (60% oil dispersion, 2 mg, 0.052 mmol) in tetrahydrofuran (0.5 mL) was added dropwise a solution of (8E,12E,14E)-3,6,16,21-tetra(1-ethoxyethoxy)-7-hydroxy-6,10,12,16,20-pentamethyl-18,19-epoxytricosa-8,12,14-trien-11-olide (19 mg, 0.019 mmol) obtained in Example 3-(2) in tetrahydrofuran (0.5 mL) under ice-cooling and stirring, and the reaction mixture was stirred at room temperature for 10 minutes. Then, isopropyl isothiocyanate (6.6 mg, 0.066 mmol) was added dropwise thereto, and the reaction mixture was stirred at room temperature for three hours. Water was added to the reaction mixture under ice-cooling to terminate the reaction, followed by diluting with ethyl acetate and washing with brine. The organic layer was dried over anhydrous sodium sulfate and evaporated. The resulting residue was purified by silica gel column chromatography (Kanto silica gel 60N, 40 to 100 μm; ethyl acetate:hexane=25:75) to give the title compound (10 mg, 60%) as a colorless oil.

1. temperaturecooling
2. stirringthe reaction mixture was stirred at room temperature for 10 minutes
3. stirringthe reaction mixture was stirred at room temperature for three hours
4. temperaturecooling
5. customto terminate
6. customthe reaction
7. washwashing with brine
8. dry with materialThe organic layer was dried over anhydrous sodium sulfate
9. customevaporated
10. customThe resulting residue was purified by silica gel column chromatography (Kanto silica gel 60N, 40 to 100 μm; ethyl acetate:hexane=25:75)