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Carbon-13 NMR spectra of some tetra- and pentacyclic triterpene methyl ethers

✍ Scribed by J. W. Blunt; M. H. G. Munro

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
194 KB
Volume
13
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The carbon‐13 NMR spectra have been recorded for representatives of three previously unexamined classes of pentacyclic triterpenes—lupanes, fernanes and arboranes. In addition to the spectra of lupeol methyl ether, cylindrin and arundoin, the spectra of a number of other triterpene methyl ethers are also recorded. The effect of methyl ether formation on the shilding values for carbons in the 3β‐hydroxy‐4,4‐dimethyl‐ ring A system is defined.

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