The O-alkylation reaction by epichlorohydrin of some natural phenolic compounds such as 4- methylcatechol, gallic acid, protocatechuic acid, pyrogallol and resorcinol was investigated. Phenolic compounds reacted first with epichlorohydrin in the presence of benzyltriethylammonium chloride as phase transfer catalyst. Then, an aqueous solution of sodium hydroxide was added. It was demonstrated that the two competitive mechanisms ...