Water → 1-Fluoro-7-propyl-2-(3,4,5-trifluorophenyl)phenanthrene

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Reaction Steps

8-fluoro-2-propyl-7-(3,4,5-trifluorophenyl)-9,10-dihydrophenanthrene produced in Example 1 was dissolved in benzene, NBS (N-bromosuccinimide) and AIBN (2,2-azobis isobutyronitrile) were added, and the temperature was gradually raised to benzene reflux temperature. Stirring was then continued for a further 2 hours, before water was added and the reaction halted, and the organic layer was then separated. The aqueous layer was extracted with toluene and this extract was combined with the organic layer, which was then washed with water and a saturated aqueous solution of sodium chloride, before being dried over anhydrous sodium sulfate. The solvent was removed by evaporation and the whole crude product was dissolved in ethyl acetate, and 5% palladium/carbon (wet) was then added, and the mixture was stirred in an autoclave under a hydrogen pressure of 4 Kg/cm2. After 5 hours stirring at room temperature, the catalyst was removed by filtration through celite, and the solvent was then removed by evaporation. The crude product was purified by silica gel column chromatography (hexane) and then recrystallized 3 times from ethanol to yield 8-fluoro-2-propyl-7-(3,4,5-trifluorophenyl)phenanthrene.

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