DETECTION OF COMPOUNDS FORMED THROUGH THE REACTION OF MALVIDIN 3-MONOGLUCOSIDE AND CATECHIN IN THE PRESENCE OF ACETALDEHYDE
DETECTION OF COMPOUNDS FORMED THROUGH THE REACTION OF MALVIDIN 3-MONOGLUCOSIDE AND CATECHIN IN THE PRESENCE OF ACETALDEHYDE
复制标题
DOI：
10.1021/jf00054a006
复制
发表时间：
1995-06-01
影响因子：
6.1
通讯作者：
SANTOSBUELGA, C
中科院分区：
文献类型：
--
作者：
RIVASGONZALO, JC;BRAVOHARO, S;SANTOSBUELGA, C
在模型溶液中研究了乙醛存在下儿茶素与锦葵素3-单葡萄糖苷的相互作用。最初形成的两种颜料（I和II），后来演变成更凝聚的结构，观察。有证据表明，要形成这些色素，儿茶素应首先与乙醛反应，所得加合物随后与花青素苷缩合;提出色素I和II是儿茶素（8->）-乙酰基-（->8）-花青素苷二聚体的两种对映体结构。对于它们的形成，相对酸性的pH是必要的;这归因于乙醛应该以阳离子形式进行缩合的要求。还观察到涉及乙醛的儿茶素单元之间的缩合。检测到少量来自花青素苷降解的物质，表明在乙醛存在下，基本上是缩合而不是发生花青素苷的降解。
The interaction between catechin and malvidin 3-monoglucoside in the presence of acetaldehyde was studied in model solutions. The initial formation of two pigments (I and II), which later evolved to more condensed structures, was observed. Evidence was found that for these pigments to be formed, catechin should first react with acetaldehyde and the resulting adduct later condenses with anthocyanin; it is proposed that pigments I and II are two enantiomeric structures of the catechin(8-->)-acetyl-(-->8)-anthocyanin dimer. For their formation, a relatively acidic pH is necessary; this is attributed to the demand that the acetaldehyde should be in cationic form for condensation to occur. Condensation among catechin units involving acetaldehyde was also seen. Minor amounts of substances from the degradation of anthocyanin were detected, indicating that in the presence of acetaldehyde it is basically condensation and not degradation of the anthocyanin that occurs.