Chlorination of anthraquinones by lichen and fungal enzymes
Phytochemistry, ISSN: 0031-9422, Vol: 44, Issue: 2, Page: 271-274
1997
- 6Citations
- 14Captures
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Article Description
Chlorination of the anthraquinones, emodin and 7-chloroemodin, was studied with an enzyme preparation from the lichen Nephroma laevigatum, and a commerically available fungal chloroperoxidase (EC 1.11.1.10). The fungal enzyme converted emodin to a mixture of 5-chloro, 7-chloro and 5,7-dichloroemodin, while converting the 7-chloro isomer to 5,7-dichloroemodin in nearly quantitative yield. The lichen enzyme, however, chlorinated emodin only at C-7 and failed to chlorinate 7-chloroemodin further. In non-enzymic controls, emodin gave the same set of products as the fungal enzyme but 7-chloroemodin did not undergo further chlorination. The chemical structures of the products were confirmed from UV, EI-mass and 1 H NMR spectral data.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0031942296003846; http://dx.doi.org/10.1016/s0031-9422(96)00384-6; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0343118713&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0031942296003846; https://api.elsevier.com/content/article/PII:S0031942296003846?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S0031942296003846?httpAccept=text/plain; http://linkinghub.elsevier.com/retrieve/pii/S0031942296003846; http://api.elsevier.com/content/article/PII:S0031942296003846?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:S0031942296003846?httpAccept=text/plain; http://dx.doi.org/10.1016/s0031-9422%2896%2900384-6; https://dx.doi.org/10.1016/s0031-9422%2896%2900384-6
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