The chemistry of triterpenes and related compounds. Part XLVII. Clarification of the nature of the tetracyclic triterpene acids of elemi resin
- 1 January 1970
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- No. 5,p. 739-743
- https://doi.org/10.1039/j39700000739
Abstract
The literature concerning the tetracyclic triterpene acids of elemi resin is confused. The acids have been reexamined by modern techniques and shown to be 3-oxotirucalla-8,24-dien-21-oic acid (IV), the corresponding 3α- and 3β-hydroxy-acids (I and VI), and 3α-hydroxytirucalla-7,24-dien-21-oic acid (X). The 3α-hydroxy-Δ7- and -Δ8- acids are difficult to separate and occur in different samples of resin in varying proportions. It is suggested that the confusion has arisen because samples of α-elemolic acid used by different workers have been mixtures of varying proportions of the 3α-hydroxy-Δ7- and -Δ8-acids. The possible biogenesis of 3α-hydroxy-triterpenes is discussed.Keywords
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