An unusual acylated malvidin 3-glucoside from flowers of Impatiens textori Miq. (Balsaminaceae)
摘要:
Acylated malvidin 3-glucoside was isolated from the purple flowers of Impatiens textori Miq. as a major anthocyanin component along with malvidin 3-(6-malonyl-glucoside). Its structure was elucidated to be malvidin 3-O-[6-O-(3-hydroxy-3-methylglutaryl)-beta-glucopyranoside] by chemical and spectroscopic methods. (C) 2009 Elsevier Ltd. All rights reserved.
Malvidin 3-Glucoside–Fatty Acid Conjugates: From Hydrophilic toward Novel Lipophilic Derivatives
作者:Luís Cruz、Marta Guimarães、Paula Araújo、Ana Évora、Victor de Freitas、Nuno Mateus
DOI:10.1021/acs.jafc.6b05461
日期:2017.8.9
determined, confirming a lipophilicity increase concomitant with the fattyacidchainlength. The antioxidant profile was also evaluated by using two in vitro methods (β-carotene–lineolate method and oxygen consumption assay). Overall, a maximum of antioxidant activity was achieved when malvidin 3-glucoside was conjugated with caprylic acid (C8). Altogether, the results obtained provide a good perspective
Unusual anthocyanin reaction with acetone leading to pyranoanthocyanin formation
作者:Yinrong Lu、L.Yeap Foo
DOI:10.1016/s0040-4039(00)02246-2
日期:2001.2
Anthocyanins undergo unusual facile reactions with acetone to give rise to pyranoanthocyanins, thus showing that the new class of pigments isolated from blackcurrant seeds were a result of solvent participation. This oxidative addition was extended to the successful synthesis of pyranomalvidin or 2-(3,5-dimethoxy-4-hydroxyphenyl)-8-hydroxy-5-methyl-3-O-β-d-glucopyranosyloxypyrano[4,3,2-de]-1-benzopyrylium
花色素苷与丙酮发生异常的易反应,生成吡喃花色素苷,因此表明从黑加仑子种子中分离出的新型颜料是溶剂参与的结果。这种氧化加成作用扩展到成功合成了吡喃马维丁或2-(3,5-二甲氧基-4-羟基苯基)-8-羟基-5-甲基-3- O -β-d-吡喃葡萄糖基氧基吡喃并[4,3,2-主要葡萄花色苷麦维京素3- O-葡萄糖苷与丙酮的反应生成de ] -1-苯并吡啶鎓。通过2D NMR充分表征了吡喃马维菌素,吡喃花色素B和吡喃德啡肽B的化学结构。
Bisulfite addition to anthocyanins: revisited structures of colourless adducts
Decolourization of anthocyanins by sulfur dioxide is investigated through the reaction between sodium bisulfite and malvidin 3-O-glucoside. The structural elucidation of the C-4 sulfonate adducts is established by 1H, 13C and 33S NMR spectroscopies.
通过亚硫酸氢钠和麦维京素3- O-葡萄糖苷之间的反应,研究了二氧化硫对花青素的脱色。通过1 H,13 C和33 S NMR光谱确定C-4磺酸盐加合物的结构。
Structure of a new dimeric acetaldehyde malvidin 3-glucoside condensation product
作者:Vessela Atanasova、Hélène Fulcrand、Christine Le Guernevé、Véronique Cheynier、Michel Moutounet
DOI:10.1016/s0040-4039(02)01294-7
日期:2002.8
A new pigment was detected in wine-like model solution containing malvidin 3-O-glucoside and acetaldehyde. This compound was isolated, and its structure was investigated by UV, MS and NMR spectroscopies. The analytical data allowed identification of it to 8,8 methyl methine-linked malvidin 3-O-glucoside dimer. The occurrence of this pigment was demonstrated in red wine. A polymeric fraction was also
Acid mediated hydrolysis of anthocyanins was studied using capillary zone electrophoresis (CZE). A commercially available wild blueberry (Bilberry) extract was dissolved in different concentrations of TFA (0.1, 1, 3, 9%), then was subjected to thermodecomposition reaction at 95 °C. After the reaction, the samples were analyzed by CZE. The hydrolysis rate of each anthocyanin and the formation of the aglycon were determined by the change in the peak pattern of the anthocyanins in the electropherogram. Each anthocyanin peak decreased time dependently in a first order kinetic fashion. It was revealed that the hydrolysis rate of each anthocyanin was determined primarily by the type of conjugated sugar and not by the aglycon structure. The rate constant of anthocyanin hydrolysis was in the following order, arabinoside>galactoside>glucoside without regard to the aglycon structure. The kinetic behavior of this anthocyanin hydrolysis together with the CZE mobility allowed us to identify an unknown CZE peak as delphinidin 3-O-β-arabinoside. At low TFA concentration, significant decomposition of the anthocyanidin nucleus occurred, but the glycoside hydrolysis predominated at high TFA concentration. It was further revealed that the aglycon released reacted successively to form polymeric products at higher TFA conditions.