Procyanidin polymers of Douglas fir bark: Structure from degradation with phloroglucinol
作者:Lai Yeap Foo、Joseph J. Karchesy
DOI:10.1016/0031-9422(89)80303-6
日期:1989.1
Abstract Reaction of the condensed tannin polymers of Douglas fir inner bark with phloroglucinol yielded catechin, epicatechin, procyanidin B-2, catechin-(4α→2)-phloroglucinol, epicatechin-(4β→2)-phloroglucinol, the novel compound epicatechin-(4α→2)-phloroglucinol and 1,3-di (2,4,6-trihydroxyphenyl)-1-(3,4-di-hydroxyphenyl)-propan-2-ol. Also isolated were epicatechin-(4β→8)-epicatechin-(4β→2)-phloroglucinol
摘要 花旗松内皮的缩合单宁聚合物与间苯三酚反应生成儿茶素、表儿茶素、原花青素 B-2、儿茶素-(4α→2)-间苯三酚、表儿茶素-(4β→2)-间苯三酚、新型化合物表儿茶素-( 4α→2)-间苯三酚和1,3-二(2,4,6-三羟基苯基)-1-(3,4-二-羟基苯基)-丙-2-醇。还分离出了表儿茶素-(4β→8)-表儿茶素-(4β→2)-间苯三酚、表儿茶素-(4β→6)-表儿茶素-(4β→2)-间苯三酚和其他三种新型间苯三酚加合物,儿茶素-(4α →8)-表儿茶素-(4β→2)-间苯三酚、表儿茶素-(4β→8)-表儿茶素-(4β→8)-表儿茶素-(4β→2)-间苯三酚和表儿茶素-(4β→6)-表儿茶素- (4β→8)-表儿茶素-(4β→2)-间苯三酚。结果表明,扩展单元的配置几乎完全是 2,3-顺式,而终端单元则是混合的,有 2, 3-顺式略占优势。C-4 到 C-8 间黄酮连接以 4:1 的比例超过