Published December 10, 2021
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Hydrogen-bonded xanthones as potential UV absorbers. The synthesis of xanthones from bio-renewable cardanol utilizing a ceric ammonium sulfate (CAS) mediated oxidation reaction
Authors/Creators
- 1. Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO Wits 2050, South Africa
- 2. Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 115, 10623 Berlin, Germany
Description
The synthesis of hydrogen-bonded xanthones using the bio-renewable phenol, cardanol is described. Cardanol was initially converted into hydroxy-benzophenones. These benzophenones were converted into xanthones utilizing an oxidative ceric ammonium sulfate (CAS) mediated reaction. Subsequent ruthenium-mediated late-stage oxidation of the xanthones provided hydrogen-bonded xanthones, which displayed good UVA and UVB absorbing properties.
Notes
The authors would like to thank the South African National Research Foundation (NRF) under the German/South Africa Research Cooperation for funding of the project.