[Transformation products of vitamin E and its analog--chroman C1 in an oxidizing ethyl linoleate medium]

Spirodimers, dimers, quinones of alpha-tocopherol and chroman C1 have been synthesized by the alpha-tocopherol and chroman Ci oxidation with K3[Fe(CN)6] and FeCl3. Products of the oxidative transformation of alpha-tocopherol and chroman Ci, viz. dimers, quinones and trimers, in the media of ethyllinoleate and nonane have been identified by HPLC, TLC, UV, IR and 1H NMR spectroscopy. The mechanism of the transformation and modifying activity of chromans under various oxidation conditions are discussed with regards to the experimental data.