Biosynthesis of terpenes and steroids. Part III. Squalene cyclisation in the biosynthesis of triterpenoids; the biosynthesis of fern-9-ene in Polypodium vulgare Linn
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- p. 110-116
- https://doi.org/10.1039/j39710000110
Abstract
An examination of the pentacyclic triterpenes of Polypodium vulgare Linn. has shown the presence of 21-epifern-9-ene, fern-7-ene, hopene-1, and an as yet unidentified triterpene hydrocarbon, in addition to the previously reported constituents. The biosynthesis of fern-9-ene was shown to involve a direct proton-catalysed cyclisation of squalene, rather than a cyclisation–reduction process based on 2,3-epoxysqualene.Keywords
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