Results 161 to 170 of about 2,590 (216)

Ring-D fragmentation of cardenolides

Biological Mass Spectrometry, 1977
The major fragmentation paths typical for the cardenolides system have been elucidated by labelling studies.
E, Flaskamp, H, Budzikiewicz
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Cardenolides from Erysimum cheiranthoides

Phytochemistry, 1996
Three new cardiac glycosides were isolated along with two known cardenolides from the seeds of Erysimum cheiranthoides. The new ones were characterized by spectral methods as 16 beta-hydroxystrophanthidin (strophadogenin) 3-O-beta-glucopyranosyl-(1-->4)-beta-boiviopyranoside, strophadogenin 3-O-alpha-rhamnopyranosyl-(1-->4)-beta-digitoxopyranoside and ...
Z H, Lei, S, Yahara, T, Nohara, T B, Shan, J Z, Xiong   +4 more
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ChemInform Abstract: PARTIAL SYNTHESES OF CARDENOLIDES AND CARDENOLIDE ANALOGS. II. SYNTHESIS OF CARDENOLIDE‐ANALOGOUS Γ‐STEROIDYL BUTENOLIDES

Chemischer Informationsdienst, 1981
AbstractDie Ausgangsverbindung zur Synthese der Cardenolid‐Analogen (III) und (IV) bzw. (VI) ist das in hoher Ausb. nach bekannter Methode erhaltene β‐Ketosulfoxid (I).
F. THEIL, C. LINDIG, K. REPKE
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ChemInform Abstract: PARTIAL SYNTHESES OF CARDENOLIDES AND CARDENOLIDE ANALOGS. III. SYNTHESIS OF CARDENOLIDE‐ANALOGOUS METHYL β‐STEROIDYLCROTONATES

Chemischer Informationsdienst, 1981
AbstractDas Ausgangsprodukt für die Synthesen der Cardenolid‐Analogen (VII) bzw. (XI) ist das aus dem Iodketon (I) erhaltene (II).
F. THEIL, C. LINDIG, K. REPKE
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Two cardenolides fromCalotropis procera

Magnetic Resonance in Chemistry, 1999
Two cardiotonic glycosides were isolated from Calotropois procera; one of them (1) is a new natural product. Their structures were elucidated by extensive application of oneand two-dimensional 1H and 13C NMR spectroscopy. Copyright  1999 John Wiley & Sons, Ltd.
Atef G. Hanna, M. Hani A. Elgamal, Nagy A. M. Morsy, Helmut Duddeck, József Kovács, Gábor Tóth   +5 more
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SYNTHETIC CARDENOLIDES AND RELATED PRODUCTS

Pure and Applied Chemistry, 1970
Abstract
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Cardenolide analogues. 3. A fast thin layer Chromatographic separation of cardenolide diastereomers

Steroids, 1978
Cardenolide diasteromeric mixtures may be analytically separated on 2.5 x 6.5 cm x 0.25 mm pre-coated silical gel 60 F-250 (EM) tlc plates (cut from 20 x 20 cm plates). Three successive developments in mixtures of CH2Cl2-EtOAc-MeOH achieve complete separation of diastereomers in less than 15 minutes, and 2--6 micrograms of sample is sufficient.
K, Yoshioka, D S, Fullerton
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ChemInform Abstract: PARTIAL SYNTHESES OF CARDENOLIDES AND CARDENOLIDE ANALOGS. IX. CARDENOLIDE DERIVATIVES WITH AN UNSATURATED ALDEHYDE FUNCTION AT THE LACTONE RING

Chemischer Informationsdienst, 1984
AbstractDie SeO2‐Oxidation der Allyldigitoxine (I) ergibt die Aldehyde (II).
B. STRECKENBACH, K. R. H. REPKE
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A novel approach to cardenolides

The Journal of Organic Chemistry, 1985
On prepare l'acetoxy-3β card-5α,14α ene-20(22) olide et son isomere-5β a partir de l'acetoxy-3β androstane-5α one-17 et de son isomere ...
Wolfram Harnisch, Enrico Morera, Giorgio Ortar   +2 more
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Saponins and Cardenolides

1998
Saponins are compounds that possess a polycyclic aglycone moiety with either a steroid (typically C27) or triterpenoid (C30) structure attached to a carbohydrate unit (a monosac-charide or oligosaccharide chain) (Fig. 24.1). These sugar units are composed variously of pentoses, hexoses, or uronic acids.
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