1.A new method is proposed for increasing the antioxidant efficiency of chemical compounds of the hydroquinone class by aminomethylation. Four Mannich base derivatives of hydroquinone were synthesized by this method.2.The relative antioxidant efficiency of the compounds synthesized was assessed by an accelerated kinetic method. All the hydroquinone derivatives investigated had a high antioxidant activity in the oxidation of methyl oleate.