反应详情

To a solution of 23.6 g (0.142 mole) of fluorene and 50.0 g (0.35 mole) of 4-chlorobutyryl chloride in 1500 ml of methylene chloride chilled to -20° C. is added 39.8 g (0.298 mole) of aluminum chloride with rapid stirring. The reaction mixture is refluxed four hours, stirred at room temperature for 16 hours, then poured onto ice/conc. HCl. The organic layer is separated, washed with saturated sodium bicarbonate solution and dried over magnesium sulfate. After filtration, the methylene chloride solution is evaporated to dryness and the solid residue recrystallized from acetone to yield 2,7-bis(4-chlorobutyryl)fluorene, M.P. 172°-175° C.

1. temperatureThe reaction mixture is refluxed four hours
2. additionpoured onto ice/conc
3. customThe organic layer is separated
4. washwashed with saturated sodium bicarbonate solution
5. dry with materialdried over magnesium sulfate
6. filtrationAfter filtration
7. customthe methylene chloride solution is evaporated to dryness
8. customthe solid residue recrystallized from acetone