1-(4'-Fluoro(1,1'-biphenyl)-4-yl)ethanone → 4-(4-Fluorophenyl)benzoic acid

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

NaOH (7 g) was dissolved in water (25 mL) and cooled in an ice bath. Bromine (7.8 g) was added dropwise to give a solution of NaOBr. 1-(4′-Fluoro-biphenyl-4-yl)-ethanone (0.01 mol) was dissolved in dioxane (35 mL) and warmed to 50° C. in a water bath. The NaOBr solution was added slowly to the stirred solution of the biphenyl acetate and stirring continued at 50° C. for a further 20 minutes. The solution was allowed to cool and a solution of sodium metabisulphite (8 g in 40 mL water) was added followed by water (170 mL). 50 mL of the liquid was evaporated under reduced pressure with heating. The remainder was acidified with HCl (5 mL) and a white precipitate formed upon cooling. The precipitate was filtered and recrystallised from acetic acid to give the title compound. δC (CDCl3, 62.9 MHz): 115.9, 126.8, 129.2, 129.6, 129.8 (d, J 2.9), 135.5 (d, J 2.9), 143.2, 162.4 (d, J 245.1) and 167.2.

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