Structure of Polymeric Polyphenols of Cinnamon Bark Deduced from Condensation Products of Cinnamaldehyde with Catechin and Procyanidins
作者:Takashi Tanaka、Yosuke Matsuo、Yuko Yamada、Isao Kouno
DOI:10.1021/jf800921r
日期:2008.7.1
of the reaction products of cinnamaldehyde with procyanidin B1 suggested that procyanidins were oligomerized in a manner similar to the reaction with catechin. Furthermore, (13)C NMR spectral comparison of the condensation products with the polymeric procyanidins obtained from commercial cinnamon bark strongly suggested that the procyanidins in the cinnamon bark also were polymerized by reaction with
通过光谱法确定了肉桂醛与(+)-儿茶素反应获得的两种缩合产物的结构。其中一个在儿茶素骨架的C-6和C-8位置有两个苯基丙烷单元。另一产物具有带有两个儿茶素和两个苯基丙烷单元的二聚体结构。肉桂醛与原花青素B1的反应产物的基质辅助激光解吸飞行时间质谱分析表明,原花青素以与儿茶素反应相似的方式低聚。此外,缩合产物与从商业肉桂皮获得的聚合原花青素的(13)NMR光谱比较强烈表明,肉桂皮中的原花青素也通过与肉桂醛反应而聚合。