Epoxidation of natural propenylbenzenes (safrol, isosafrol, anethol, eugenol and isoeugenol) was carried out using iron complexes as catalysts ([Fe III (TPP)Cl] and [Fe III (Salen)Cl]·H 2 O, where TPP=5,10,15,20-meso-tetraphenylporphyrin and Salen=N,N′-(salicylaldehyde)ethylenediamine) in presence of hydrogen peroxide 30% and glacial acetic acid. Reaction products were identified by gas chromatography and satisfactory yields were obtained. Quantitative conversion of isosafrol to the corresponding epoxide was achieved in presence of [Fe III (TPP)Cl] as catalyst.