In vivo and in vitro preparation of divinyl-132,173-cyclopheophorbide-a enol |
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| Authors: | Yusuke Kinoshita Motoki Kayama Yuichiro Kashiyama Hitoshi Tamiaki |
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| Affiliation: | 1. Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan;2. Graduate School of Applied Science and Engineering, Fukui University of Technology, Fukui, Fukui 910-8505, Japan |
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| Abstract: | Divinyl-132,173-cyclopheophorbide-a enol was in vivo produced as a metabolite of divinyl-chlorophyll-a by protists and in vitro prepared by the intramolecular cyclization of methyl divinyl-pyropheophorbide-a, one of the divinyl-chlorophyll-a derivatives. The 1H NMR spectra in CDCl3 showed that the obtained product took exclusively its enol form in the solution. The intramolecular cyclization of chlorin π-system at the C132 and C173 positions affected the optical properties of such chlorophyll derivatives including the non-fluorescent emission of the enol. |
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| Keywords: | Divinyl-chlorophyll Chlorophyll catabolism Biodegradation Intramolecular cyclization |
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