Peroxidase enzymes from various sources convert 2′,4,4′-trihydroxychalcone (1) into the novel quinol ether of 2-fromyl-6-hydroxycoumaranone (6), the structure of which was determined by X-ray diffraction; a biosynthetic pathway is suggested and capillarisin (11) may arise by a similar route.
M. J. Begley, L. Crombie, M. London, J. Savin and D. A. Whiting, J. Chem. Soc., Chem. Commun., 1982, 1319 DOI: 10.1039/C39820001319
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