FRIEDEL-CRAFAFTS DIPHENYLMETHYLATION OF B ENZENE WITH DIPHENYLMETHANOLS USING IRON(III) CHLORIDE

When a mixture of diphenylmethamols and iron(III) chloride (FeCl3) was heated in benzene, Friedel-Crafts' diphenylmethylation took place to yield triphenylmethanes with the corresponding benzophenones as by-pro ducts. [GRAPHICS] X; H, o-CH3, m-CH3, p-CH3 P-Cl, p-NO2 The yield of t riphenylmethanes could be elevated without a formation of benzophenone s by adding a small amount of tribenzylamine to the benzene solution o f diphenylmethanols and FeCl3. [GRAPHICS] X; H, o-CH3, m-CH3, p-CH3, p -Cl, p-NO2 Pentylamine and hydroquinone could be used to get more yiel d of triphenylmethane in the reaction of benzene with diphenylmethanol .