反应详情

To a well-stirred solution of 8.8 grams of 9,9-bis[2-(methoxycarbonyl)ethyl]-2,7-bis(phenyl-m-tolylamino)fluorene in 150 milliliters of dried tetrahydrofuran under a nitrogen atmosphere was added in small portions, 0.52 gram, of lithium aluminum hydride over a period of 15 to 30 minutes. The reaction mixture was stirred at room temperature for two hous. Ten percent aqueous sodium hydroxide solution was then slowly added to the reaction mixture. The organic layer was separated and evaporated to dryness under reduced pressure. The residue as dissolved in methylene chloride, and washed several times with water. Evaporation of the dry methylene chloride solution provided a white solid, which was recrystallized from isopropanol and water to yield 7.8 grams of the above fluorene pure product, melting point, 216° to 217° C.

1. customThe organic layer was separated
2. customevaporated to dryness under reduced pressure
3. dissolutionThe residue as dissolved in methylene chloride
4. washwashed several times with water
5. customEvaporation of the dry methylene chloride solution
6. customprovided a white solid, which
7. customwas recrystallized from isopropanol and water