54542-51-7Relevant articles and documents
Isoquercitrin esters with mono- or dicarboxylic acids: Enzymatic preparation and properties
Vav?íková, Eva,Langschwager, Fanny,Jezova-Kalachova, Lubica,K?enková, Alena,Mikulová, Barbora,Kuzma, Marek,K?en, Vladimír,Valentová, Kate?ina
, (2016/06/14)
A series of isoquercitrin (quercetin-3-O-β-D-glucopyranoside) esters with mono- or dicarboxylic acids was designed to modulate hydro- and lipophilicity and biological properties. Esterification of isoquercitrin was accomplished by direct chemoenzymatic re
DECARBOXYLATION AND EXCHANGE REACTIONS IN FLAVONOID GLYCOSIDE MALONATES
Horowitz, R. M.,Asen, S.
, p. 2531 - 2532 (2007/10/02)
Flavonoid malonylglycosides lose carbon dioxide and give the corresponding flavonoid acetylglycosides under conditions that are often used in determining their NMR spectra (DMSO-d6 at 80-100 deg C).If the solvent contains exchangeable deuterium the malonyl methylene protons may exchange and trideuterioacetyl derivatives form.The NMR spectra of these substances should be run initially at ambient temperature in the absence of solvents containing exchangeable deuterium.Key Word Index - Gerbera jamesonii; Compositae; Ipomoea tricolor; Convolvulaceae; NMR; decarboxylation; proton-deuterium exchange; flavonoid malonylglycosides.