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An Unusual Photoreaction of 3,4-Di-O-benzyl-hypericin

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Summary.

 Upon irradiation of 3,4-di-O-benzyl-hypericin and proton sponge (bis-1,8-N,N-dimethylamino-naphthalene) in benzene solution, a stable radical ion pair formed which exhibited an intense absorption band around 800 nm. This was advanced by UV/Vis, NMR, and ESR spectroscopy. In presence of oxygen, irradiation of this photoproduct led to an activated oxygen species which then attacked the proton sponge.

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Authors and Affiliations

  1. Institut für Chemie, Johannes Kepler Universität, A-4040 Linz, Austria, , , , , , AT

    Thomas G. Dax & Heinz Falk

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  1. Thomas G. Dax
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  2. Heinz Falk
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Received July 17, 2000. Accepted July 20, 2000

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Dax, T., Falk, H. An Unusual Photoreaction of 3,4-Di-O-benzyl-hypericin. Monatshefte fuer Chemie 131, 1217–1219 (2000). https://doi.org/10.1007/s007060070031

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  • DOI: https://doi.org/10.1007/s007060070031

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