## Abstract ^13^C NMR spectra of friedelan, friedelan‐21‐one, friedelan‐6‐one, friedelane‐321‐dione, friedelane‐3,6‐dione and friedelane‐3,6,21‐trione have been recorded and signals assigned using off‐resonance decoupling, inversion recovery and lanthanide induced shift techniques.
Nuclear magnetic resonance spectrometry of naturally occurring polyprenols
✍ Scribed by J. Feeney; F.W. Hemming
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- English
- Weight
- 788 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0003-2697
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✦ Synopsis
h number of alcohols with the general formula I, where 7~ = 1 to 13, occur in nature. Green leaves of many higher plant,s yield polyprenols (structure I) in which TL = 9 to 13 (l-4), while the wood of the silver hircsh contains polyprenols with from 6 to 9 isoprene residues (1, 5, 6). A series of alcohols in which n = 16 to 21 and in which the OH-terminal koprene residue is saturated (Structure II) have been isolated from mammalian tissues and have heru termed dolichols (1, 7). Similar alcohols ill \-hich n varies from 14 to 18 have been isolat'ed from bakers' yeast (1, 8). Finally, the mould Aspergillus jumigatus Fresenius has been shown to contain a family of hexahydropolyprenols (Structure III) containing 18 to 24 imprem FEENEY AND HEMMING
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## Abstract The ^13^C NMR spectra of lupeol and related triterpenes were recorded and all carbon shifts assigned. Their analysis aided in the shift assignment of the structurally related hopane‐like triterpenes.
## AbStlBCt The applications of nuclear magnetic resonance (NMR) spectrometry to solid polymers are reviewed. Emphasis is given to the determination of chemical structure, and the characterization of molecular dynamics in the solid state. The types of information that can be obtained from NMR spec