反应详情

温度

0 °C

A 2.5M solution of butyllithium in hexanes (9.6 mL, 24 mmol), (Aldrich) was added dropwise to a solution of 2-methylthiophene (1.96 g, 20 mmol) in anhydrous tetrahydrofuran (10 mL) with stirring under argon at 0° C. The mixture was stirred at room temperature for 0.5 h and then cooled to 0° C. A solution of 9-fluorenone (3.6 g, 20 mmol), (Aldrich) in anhydrous tetrahydrofuran (5 mL) was added dropwise to the mixture with stirring and cooling at 0° C. The reaction mixture was stirred at room temperature for 1 h, poured into a saturated solution of ammonium chloride (5 mL) and extracted with dichloromethane (3×20 mL). The combined dichloromethane extracts were washed with brine (10 mL), dried (MgSO4), the solvent evaporated and the residue chromatographed on silica gel column with 10% ethyl acetate in hexanes to give the title compound as an oil.

1. stirringThe mixture was stirred at room temperature for 0.5 h
2. temperaturecooled to 0° C
3. stirringwith stirring
4. temperaturecooling at 0° C
5. stirringThe reaction mixture was stirred at room temperature for 1 h
6. extractionextracted with dichloromethane (3×20 mL)
7. washThe combined dichloromethane extracts were washed with brine (10 mL)
8. dry with materialdried (MgSO4)
9. customthe solvent evaporated
10. customthe residue chromatographed on silica gel column with 10% ethyl acetate in hexanes