Results 121 to 130 of about 1,572 (155)

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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Partialsynthesen von Cardenoliden und Cardenolid‐Analogen. VIII. Lactonring‐alkylierte Cardenolide

Journal für Praktische Chemie, 1983
Partial Syntheses of Cardenolides and Cardenolide Analogues. VIII. Lactone Ring‐Alkylated CardenolidesBase‐catalyzed alkylation of digitoxigenin (1), digitoxin (2), digoxigenin (3), and gitoxigenin‐3,16‐diacetate (4) with allyl bromide, allyl chloride or n‐propyl bromide in DMF resulted in the formation of the 22‐allyl‐, 21ξ,22‐diallyl‐, 22‐propyl ...
Barbara Streckenbach, Peter Franke, Rainer Hintsche, Hans Joachim Portius, Kurt R. H. Repke   +4 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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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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Antiproliferative cardenolides from Periploca graeca

Planta Medica, 2007
Nine cardiotonic steroids, six 17beta-cardenolides (2, 4, 6-9) and three 17alpha-cardenolides (1, 3, 5) have been identified from the chloroform and chloroform-methanol extracts of Periploca graeca L. (Asclepiadaceae) stems. Among these, compound 5, the 17alpha-isomer of periplocin 6, was identified as a new compound.
D. SPERA, T. SICILIANO, N. DE TOMMASI, BRACA, ALESSANDRA, A. VESSIRES   +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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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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Alepposides, Cardenolide Oligoglycosides from Adonis aleppica

Journal of Natural Products, 1993
The structures of novel oligoglycosidic cardenolides, alepposide A (C55H86O23) [1] and alepposide B (C48H74O20) [2], have been deduced mainly by nmr methods. Based on homonuclear (1H and 13C nmr, 1H COSY) and proton-detected heteronuclear shift correlation experiments [HMQC both for 1J(C,H) and for long-range couplings], alepposide A [1] was shown to ...
G F, Pauli, P, Junior, S, Berger, U, Matthiesen   +3 more
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Cardenolides ofSecurigera securidaca. II.

Chemistry of Natural Compounds, 1965
The seeds ofSecurigera securidaca have been found to contain a cardiac glycoside securidaside, which is securigenin xyloglucoside. By stepwise enzymatic hydrolysis, securidaside can be decomposed into the monoxyloside securiside or into the aglycone and the sugar component.
V. V. Zamula, N. P. Maksyutina, D. G. Kolesnikov   +2 more
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