Transition metal catalyzed reactions of diaryliodonium salts. VII. Palladium-catalyzed reaction of diaryliodonium salts with allylic alcohols.

Palladium-catalyzed arylation of allyl and 2-methylallyl alcohols with diaryliodonium salts has been investigated. The reaction proved to be useful in converting aromatic hy d r ocarbons to the corresponding arylpropanals in two steps. Thus, 3-(p-isopropylpheny1) - 2 methylpropanal(cyclamaeldne hyde)a nd 3-(p-isobutylphenyl)-2-methylpropanaall(dlielyhyde), which are perfume for soap and toilet, were obtained from isopropylbenzene and isobutylbenzene in 78 and 82% yields, respectively.