New Phenylpropanoid-Substituted Flavan-3-ols from the Leaves of Castanopsis sclerophylla
作者:Takashi Tanaka、Yong-Lin Huang、Yosuke Matsuo、Isao Kouno、Dian-Peng Li、Gen-ichiro Nonaka
DOI:10.3987/com-11-12280
日期:——
Castanopsis species, two previously unknown flavan-3-ols, named sclerophynins A and B, were isolated from the leaves of C. sclerophylla, together with five related known compounds. On the basis of spectroscopic analysis, the new compounds were characterized to be (4S,8R,9S)-4-(3,4-dihydroxyphenyl)-8-(3,4, 5-trihydroxyphenyl)-3,4,9,10-tetra-hydro-5,9-dihydroxy-2H,8H-benzo[1,2-b:3,4-b']dipyran-2one and
在对中国栲属物种进行化学分类学研究的过程中,从硬叶硬叶植物的叶子中分离出两种以前未知的名为 sclerophynins A 和 B 的黄烷-3-醇,以及五种相关的已知化合物。经光谱分析,新化合物特征为(4S,8R,9S)-4-(3,4-二羟基苯基)-8-(3,4,5-三羟基苯基)-3,4,9, 10-四氢-5,9-二羟基-2H,8H-苯并[1,2-b:3,4-b']dipyran-2one和(4S,7S,8R)-4,8-bis(3 ,4-二羟基苯基)-3,4,6,7-四氢-5-吡喃葡萄糖基氧基-7-羟基-2H,8H-苯并[1,2-b:5,4-b']dipyran-2-one . Castanopsis属属于Fagaceae科,包含大约120种。东亚记录了 50 多种树种,其中许多是重要的观赏树木和用作建筑材料。一些物种的种子可食用,叶子和树皮可药用。然而,尽管物种数量众多,但很少进行化学分类学研究。以前,从