Journal ArticleDOI
13C and1H NMR spectroscopy as a tool in the configurational analysis of iridoid glucosides
Reads0
Chats0
TLDR
In this article, the chemical shift for C-9 in a range of substituted compounds is shown to be numerically related to the stereochemistry at C-8, which allows the determination of the configuration at this centre for most types of substitution patterns by calculation of the C- 9 shift using increments for each substituent.About:
This article is published in Phytochemistry.The article was published on 1981-01-01. It has received 173 citations till now. The article focuses on the topics: Iridoid Glucosides & Proton NMR.read more
Citations
More filters
Journal ArticleDOI
Iridoid Glucosides with Free Radical Scavenging Properties from Fagraea blumei
TL;DR: In this article, four iridoid glucosides 1−4, named blumeosides A−D, were isolated from the methanolic stem-bark extract of Fagraea blumei G. (Loganiaceae).
Journal ArticleDOI
Chemotaxonomy of Plantago. Iridoid glucosides and caffeoyl phenylethanoid glycosides.
TL;DR: The close relationship between Plantago and Veronica suggested by chloroplast DNA sequence analysis could be corroborated by the common occurrence of the rare 8,9-unsaturated iridoids in these two genera.
Journal ArticleDOI
Secologanin, a Biogenetic Key Compound—Synthesis and Biogenesis of the Iridoid and Secoiridoid Glycosides
TL;DR: The monoterpene glycoside secologanin is a key intermediate in the biosynthesis of most indole, cinchona, ipecacuanha, and pyrroloquinoline alkaloids, as well as of simple monoterPene alkal steroids.
Journal ArticleDOI
Flavonol glycosides and novel iridoid glycoside from the leaves of Morinda citrifolia
Shengmin Sang,Xiaofang Cheng,Nanqun Zhu,Ruth E. Stark,Vladimir Badmaev,Geetha Ghai,Robert T. Rosen,Chi-Tang Ho +7 more
TL;DR: One new iridoid glycoside and five known flavonol glycosides have been isolated from the leaves of Morinda citrifolia and showed DPPH free radical scavenging activity at the concentration of 30 microM.
Journal ArticleDOI
Chemotaxonomy of Veroniceae and its allies in the Plantaginaceae.
TL;DR: In a chemosystematic investigation of tribe Veroniceae (Plantaginaceae), representatives of Camptoloma, Sibthorpia, Veronica subg.
References
More filters
Journal ArticleDOI
Nuclear magnetic resonance spectroscopy. Carbon-13 chemical shifts of methycyclopentanes, cyclopentanols, and cyclopentyl acetates
TL;DR: In this paper, high-resolution nmr spectroscopy with the aid of proton decoupling was used to determine the chemical shifts of cyclopentane derivatives, including trans-3-methyl-and 1,3-dimethylcyclopentanols.
Journal ArticleDOI
Determination des configurations par “dedoublement partiel”—III : Alcools steroides
A. Horeau,Henri B. Kagan +1 more
TL;DR: The methode de dedoublement partiel as discussed by the authors is a partiel partiel (1) a ete appliquee a des alcools steroides tres varies and elle permet de trouver avec la plus grande surete la configuration α ou β de l'hydroxyle for toutes les positions examinees, exception faite des positions 2, 3 and 16 qui, en l'absence de substituants vicinaux, ne donnent lieu qu'a de faibles dedoublements.
Journal ArticleDOI
13C NMR spectroscopy of naturally occurring iridoid glucosides and their acylated derivatives
TL;DR: In this article, the 13 C NMR spectra of twenty one iridoid glucosides and fourteen acyl IRD-glucosides of various cyclopentane oxidation states were analyzed and their carbon shifts assigned.
Journal ArticleDOI
Two new iridoid glucosides from Mussaenda parviflora and Mussaenda shikokiana
TL;DR: From the leaves of Mussaenda parviflora, two new iridoid glucosides, mussaenoside and shanzhiside methyl ester were isolated and their structures were determined.
Journal ArticleDOI
Iridoid allosides from Viburnum opulus
TL;DR: In this paper, Opulus iridoid glycoside esters were isolated from foliage of Viburnum opulus (Caprifoliaceae) and the structures were elucidated by 1 H and 13 C-NMR spectroscopy and by cleavage of the glycosidic linkage with boron trifluoride etherate in acetic anhydride.