Neue melampolide und cis,cis-germacranolide aus vertretern der subtribus melampodiinae
作者:Ferdinand Bohlmann、Jasmin Jakupovic、Christa Zdero、Robert M. King、Harold Robinson
DOI:10.1016/s0031-9422(00)84273-9
日期:1979.1
Abstract The investigation of four South American species of the tribe Heliantheae afforded in addition to known compounds 14 new sesquiterpene lactones, mostly belonging to the melampolides, but four being further examples of cis , cis -germacranolides. The stereochemistry is established by intensive 1 H-NMR studies and some chemical transformations. Some of the new lactones were only obtainable as
摘要 对向日葵科的四种南美物种的研究提供了除已知化合物外的 14 种新倍半萜内酯,主要属于黑素内酯,但有四种是顺式、顺式-germacranolides 的进一步实例。立体化学是通过密集的 1 H-NMR 研究和一些化学转化建立的。一些新的内酯只能作为不可分离的 2-甲基丁酸酯和异戊酸酯的混合物获得。此外,分离出一种新的乙炔醛。化学分类学的情况特别针对 Smallanthus 属的位置进行了讨论。