Chilianthins A-F, Six Triterpene Esters Having Dimeric Structures from Rhoiptelea chiliantha DIELS et HAND.-MAZZ.
作者:Zhi-Hong JIANG、Takashi TANAKA、Isao KOUNO
DOI:10.1248/cpb.44.1669
日期:——
Five triterpene-lignan esters, chilianthins A-E (2-6) and a triterpene-naphthalene carboxylic acid ester, chilianthin F (7), were isolated from the bark of Rhoiptelea chiliantha DIELS et HAND.-MAZZ. (Rhoipteleaceae), together with a known triterpene caffeate, 27-caffeoyloxy-3β-hydroxyolean-12-en-28-oic acid (myriceric acid B, 1). Their structures were elucidated on the basis of spectroscopic and chemical evidence. Chilianthins A (2), B (3), C (4) and E (6) were biomimetically synthesized from 1 by oxidative coupling.
从 Rhoiptelea chiliantha DIELS et HAND.-MAZZ 的树皮中分离出五种三萜-木脂素酯,chilianthins A-E (2-6) 和三萜-萘羧酸酯,chilianthin F (7)。 (Rhoipteleaceae),以及已知的三萜咖啡酸酯,27-咖啡酰氧基-3β-羟基齐墩果酸-12-en-28-oic酸(杨梅酸B,1)。它们的结构是根据光谱和化学证据阐明的。 Chilianthins A (2)、B (3)、C (4) 和 E (6) 是通过氧化偶联从 1 仿生合成的。
Two caffeic acid tetramers having enantiomeric phenyldihydronaphthalene moieties from Macrotomia euchroma