- THERMAL TRANSFORMATION OF CARDIAC GLYCOSIDES II. ACIDLESS HYDROLYSIS OF LABILE GLYCOSIDES IN AQUEOUS ALCOHOLIC SOLUTIONS AND PROSPECTS FOR ITS UTILIZATION
-
The thermal transformations of cardiac glycosides in neutral alcoholic solutions have been investigated.The kinetics of their acidless hydrolysis at 100 and 142 deg C and the activation energy of the process have been studied.The possibility has been shown of the stepwise hydrolysis of natural trisdigitoxosides with the production of difficulty available mono- and bisdigitoxosides.The following were used as the objects of investigation: convallatoxin, glucostrophanthidin, cheirotoxin, desglucocheirotoxin, erycordin, erysimin, erysimoside, digitoxin, and cymarin.
- Makarevich, I. F.,Tishchenko, A. A.,Terno, I. S.
-
-
- NEOCONVALLOSIDE - A CARDENOLIDE GLYCOSIDE FROM PLANTS OF THE GENUS Convallaria
-
In a study of the epigeal part and seeds of Convallaria keiskei, C. majalis, and C. transcaucasica, in addition to lokundjoside, convalloside, convallotoxoloside, and neovallotoxoloside, we have isolated the previously unknown glycoside neoconvalloside, for which, on the basis of the physicochemical properties of the compound and of the products of its chemical transformations, the structure of strophanthidin 3-O- 2)-α-L-rhamnopyranoside> has been esteblished.
- Komissarenko, N. F.,Stupakova, E. P.
-
p. 186 - 189
(2007/10/02)
-
- 13C-NMR SPECTRA OF STROPHANTIDIN GLYCOSIDES OF Corchorus capsularis L.; STRUCTURE OF A NEW GLYCOSIDE: GLUCO(1-->6)OLITORISIDE
-
13C-NMR spectroscopy has been used to determine the structure of a new glycoside isolated from the seeds of Corchorus capsularis L.By spectral comparison of 13C-chemical shifts of the corresponding genin, monoside and bioside, we established that the glycoside is a trioside containing one boivinose and two glucose units; these were shown to be 1-->6β linked as in gentiobiose.This structure was confirmed by the chemical degradation of the glycoside chain, which afforded octa-O-acetyl-α-gentiobiose.
- Ricca, Giuliana Severini,Casagrande, Cesare
-
p. 349 - 352
(2007/10/02)
-
