Isolation of candirone: a novel pentaoxygenation pattern in a naturally occurring 2-phenyl-4h-1-benzopyran-4-one from tephrosia candida
✍ Scribed by Virinder S. Parmar; Rajni Jain; Ole Simonsen; Per M. Boll
- Book ID
- 104203030
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- French
- Weight
- 508 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0040-4020
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✦ Synopsis
Two flavones having very similar physical behaviour and spectral data have been isolated as minor constituents from the seeds of Tephrosia candida. Based upon a detailed and critical study of their mass spectra, extent of shifts in their UV spectra, X-ray diffraction studies, and preparation of their derivatives, the structures of these compounds have been established; one was found to be penduletin (1) and the other 5-hydroxy-2-(4-hydroxyphenyl)-3,6,8-trimethoxy-4H-1-benzopyran-4-one (z), for which the name candirone is proposed. To the best of our knowledge the latter is a new compound and this type of oxygenaton pattern is not known earlier among natural flavones.