Characteristics of oxidative reactions of condensed tannins and related polyphenols.

为了阐明缩合单宁的氧化反应特征，研究了缩合单宁及其相关多酚与正丙胺的反应行为。通过对多酚模型化合物、黄烷醇单体和二聚体以及天然缩合单宁的研究表明，在分子氧存在下，吡咯烷核与正丙胺反应生成胺化产物。相反，邻苯二酚核没有引起与n^-丙胺明显的胺化反应。

To clarify the characteristics of oxidative reactions of condensed tannins, reaction behaviors of condensed tannins and related polyphenols with n^-propylamine were studied. By the investigations using polyphenolic model compounds, monomeric and dimeric flavanols and natural condensed tannnins, it was revealed that the pyrogaloll nucleus reacts with n^-propylamine in the presence of molecular oxygen to form aminated products. In contrast, the catechol nucleus did not cause a clear amination with n^-propylamine.