The absolute configurations of (+)-usnic and (+)-isousnic acid. X-ray analyses of the (−)-α-phenylethylamine derivative of (+)-usnic acid and of (−)-pseudoplacodiolic acid, a new dibenzofuran, from the lichen .
作者:Siegfried Huneck、John A. Akinniyi、A.Forbes Cameron、Joseph D. Connolly、Alan G. Mulholland
DOI:10.1016/0040-4039(81)80095-0
日期:1981.1
The absolute configuration of (+)-usnic acid has been shown to be (4aR) as in (1) by X-ray analysis of the (−)-α-phenylethylamine derivative (2). The structure and absolute stereochemistry of (−)-pseudoplacodiolic acid (4) have been established.
通过(-)-α-苯乙胺衍生物(2)的X射线分析,如(1)所示,(+)-松香酸的绝对构型为(4aR)。已经确定了(-)-伪丙二醇酸(4)的结构和绝对立体化学。