作者:Eckhard Wollenweber、Karin Mann、Munekazu Inuma、Toshiyuki Tanaka、Mizuo Mizuno
DOI:10.1016/0031-9422(88)80220-6
日期:1988.1
Abstract A novel flavone, isolated from the farinose exudate of Primula pulverulenta , was identified as 8,2′-dihydroxyflavone. This is the first naturally occurring flavone, in which ring A is oxygenated only at C-8. The structure was deduced from spectral comparisons with the structurally related flavones: 5,2′-, 3,2′- and 2′,3′-dihydroxyflavone and confirmed by total synthesis. The spectral properties
摘要 从 Primula pulverulenta 的粉糖分泌物中分离出一种新的黄酮,被鉴定为 8,2'-二羟基黄酮。这是第一个天然存在的黄酮,其中环 A 仅在 C-8 处被氧化。该结构是从与结构相关的黄酮的光谱比较中推导出来的:5,2'-、3,2'-和 2',3'-二羟基黄酮,并通过全合成证实。与 8,2'-二羟基黄酮相关地讨论了具有简单模式的其他黄酮氧合的光谱特性。