Results 141 to 150 of about 723 (194)

NMR investigations of rotenoids

Tetrahedron, 1973
Abstract Extensive NMR studies of major rotenoids have (1) verified the cis B/C ring fusion of rotenone; (2) confirmed the structure of the reduction-dehydration product of rotenone; (3) provided considerable evidence regarding the preferred conformations of rotenoids; (4) revealed an array of long-range couplings; and (5) pointed up analytically ...
D.G. Carlson, D. Weisleder, W.H. Tallent
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Preparation of synthetic rotenoids

Experientia, 1975
Eine einfache Synthese von Rotenoiden durch Kondensation von 4-Ethoxycarbonyl-3-chromanonen mit Phenolen und katalytischer Hydrierung der entstehenden Dehydrorotenoide wird beschrieben.
R. Verhé, N. Schamp
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Reactions of rotenoids with hydroxylamine

Liebigs Annalen der Chemie, 1988
AbstractReaction of rotenone (1a) and amorphigenin (2a) with hydroxylamine in alkaline medium affords a mixture of the isoximes 5 and 6, and the new 6a‐NH2 spiro derivatives 12a, b and 13a, b. The structures, stereochemistry, and the mechanisms of formation of these products are discussed.
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Mass spectral studies of some rotenoid stereoisomers [PDF]

Organic Mass Spectrometry, 1985
Ivanka Kostova, Nevena Mollova
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Optical resolution of rotenoids

Journal of Heterocyclic Chemistry, 1987
AbstractOptical resolution of selected rotenoids containing 1‐3 asymmetric centers in dihydrobenzopyranofuroben‐zopyranone and dihydrobisbenzopyranopyranone series has been achieved on two chiral high‐performance liquid chromatographic (hplc) stationary phases.
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Rotenoids from roots of Clitoria Fairchildiana

Phytochemistry, 1998
A new rotenoid, named 9-demethylclitoriacetal, together with the known compounds, 11-deoxyclitoriacetal, 6-deoxyclitoriacetal, clitoriacetal and stemonal, was isolated from roots of Clitoria fairchildiana. Its structure was elucidated as 6a,12a-dihydro-6,9,11,12a-tetrahydroxy-2,3-dimethoxy-[1]benzopyrano[3,4-b] [1]benzopyran-12(6H)-one (1), on the ...
Bernadete P., Silva, Robson R., Bernardo, José P., Parente   +2 more
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Novel N-containing rotenoid and seco-rotenoid from the root of Derris elliptica

Journal of Asian Natural Products Research, 2009
Two new rotenoids, 2-hydroxy-5-aminorotenonone (1) and elliptoic acid (2), were isolated from the roots of Derris elliptica collected in Guangdong Province, China. Their structures were established by extensive spectral analysis. Compound 1 is the first N-containing rotenoid and compound 2 is the third rotenoid with the cleavage of C(12)-C(12a).
Hai-Ying, Lu, Jing-Yu, Liang
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Rotenoids from Boerhaavia repens

Phytochemistry, 1990
Abstract Two new rotenoid derivatives have been identified from Boerhaavia repens . The structures were elucidated by high field 1 H NMR techniques.
Maniruddin Ahmed, Bidyut Kanti Datta, Abu Shara Shamsur Rouf   +2 more
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Biosynthesis of rotenoids. Chalcone, isoflavone, and rotenoid stages in the formation of amorphigenin by Amorpha fruticosa seedlings

Journal of the Chemical Society, Perkin Transactions 1, 1973
[2′-14C]-7-Hydroxy-2′,4′,5′-trimethoxyisoflavone (2b) is shown to be excellently converted into [6-14C]-amorphigenin (1b) by Amorpha fruticosa seedlings, this being the first direct demonstration of the biosynthetic link between isoflavones and rotenoids.
Leslie Crombie, Paul M. Dewick, Donald A. Whiting   +2 more
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Chemistry of the Natural Rotenoids

1963
In many warm countries of the world the natives fish by throwing preparations of crushed plant material into ponds and streams. These preparations cause stupefaction of the fish, which rise to the surface and are collected. Plants which are frequently employed in South America, tropical Africa, the East Indies and Malaya belong to the Papilionatae sub ...
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