Defuscin, a new phenolic ester from Dendrobium fuscescens: Conformation of shikimic acid☆
作者:Bani Talapatra、Asoke K. Das、Sunil K. Talapatra
DOI:10.1016/0031-9422(89)85065-4
日期:——
Abstract Defuscin, a new phenolic ester shown to be n -triacontyl p -coumarate, and (−)-shikimic acid have been isolated from the whole plant of Dendrobium fuscescens Griff. The 1 H NMR spectrum of shikimic acid is indicative of the weighted average of its two half-chair conformers, the one with 4-OH and 5-OH in equatorial orientations being the major contributor.
摘要 Defuscin,一种新的酚酯,显示为对香豆酸正三十烷基酯,和 (-)-莽草酸已从石斛 Griff 的全株植物中分离出来。莽草酸的 1 H NMR 谱表明其两个半椅式构象异构体的加权平均值,其中赤道方向具有 4-OH 和 5-OH 的构象是主要贡献者。