Results 1 to 10 of about 2,370 (198)

SYNTHETIC CARDENOLIDES AND RELATED PRODUCTS

Pure and Applied Chemistry, 1970
Abstract
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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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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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Oximes and nitriles of cardenolides

Chemistry of Natural Compounds, 1983
The influence of the oximation of cardenolides and the production of 10-cyanocardenolides on their biological activity has been studied. The prefered conformation of strophanthidin 19-aldoxime has been established; it has chelate fragment as the result of the orientation in the same direction of the nitrogen atom of the oxime group and the hydroxy ...
I. F. Makarevich, M. V. Mokrouz, L. Ya. Topchii, I. P. Kovalev, V. E. Sokolova, Yu. I. Gubin, N. P. Bublik, V. A. Polyakov   +7 more
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ChemInform Abstract: Partial Syntheses of Cardenolides and Cardenolide Analogues. Part 10. Synthesis of 22‐O‐Substituted Cardenolides and Studies on the Oxidative Degradation of Cardenolides with Potassium Permanganate.

ChemInform, 1987
AbstractOxidation of the digitoxigenin derivative (I) yields the products (II)‐(IV).
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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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Glycosylation in cardenolide biosynthesis

Plant Cell, Tissue and Organ Culture, 1994
The glycosylation and deglycosylation of cardiac glycosides was investigated using cell suspension cultures and shoot cultures, both established from Digitalis lanata EHRH. plants, as well as isolated enzymes. Shoots were capable of glucosylating digitoxigenin, evatromonoside, digiproside, glucodigitoxigenin and digitoxin. Suspension cultured Digitalis
Christoph Theurer, Hans-Joachim Treumann, Thomas Faust, Ursula May, Wolfgang Kreis   +4 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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Circular Dichroism of Cardenolides

Journal f�r Praktische Chemie/Chemiker-Zeitung, 1998
The relationship between structure and circular dichroism was studied for a series of cardenolides including some compounds with saturated lactone ring.
Helmut Ripperger, Claus Lindig, G�nther Snatzke   +2 more
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21-Fluoro-cardenolides

Journal of Fluorine Chemistry, 1985
Abstract For estimation of the influence of fluorination at C21 of the lactone ring of cardenolides on their cardiac activity we have synthesized 21α- and 21β-fluoro-cardenolides by treatment of 21β-bromo-cardenolides with AgF. Prior to allylic bromination of cardenolides their OH- groups are protected by CCl 3 CH 2 OCO- groups and deprotected after ...
R. Megges, W. Rollka, J. Weiland, P. Franke, H.-J. Portius, W. Schönfeld   +5 more
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