Molecular products from the pyrolysis and oxidative pyrolysis of tyrosine.

Joshua K Kibet, Lavrent Khachatryan, Barry Dellinger

Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA.

Chemosphere 2013 May

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The thermal degradation of tyrosine at a residence time of 0.2s was conducted in a tubular flow reactor in flowing N2 and 4% O2 in N2 for a total pyrolysis time of 3min. The fractional pyrolysis technique, in which the same sample was heated continuously at each pyrolysis temperature, was applied. Thermal decomposition of tyrosine between 350 and 550°C yielded predominantly phenolic compounds (phenol, p-cresol, and p-tyramine), while decomposition between 550 and 800°C yielded hydrocarbons such as benzene, toluene, and ethyl benzene as the major reaction products. For the first time, the identification of p-tyramine, a precursor for the on of formation of p-tyramine and its degradation to phenol and p-cresol, and toxicological discussion of some of the harmful reaction products is also presented. Copyright © 2013 Elsevier Ltd. All rights reserved.

Citation

Joshua K Kibet, Lavrent Khachatryan, Barry Dellinger. Molecular products from the pyrolysis and oxidative pyrolysis of tyrosine. Chemosphere. 2013 May;91(7):1026-34