enantiomerically pure diarylheptanoid precursors by means of the straightforward biomimetic approach presented in the preceding article. The isocentrolobines are the methoxy regioisomers of the natural (+)‐ and (−)‐centrolobines and were characterized for the first time. The synthetic procedure established the absolute configurations and the unambiguous correlation with the chiroptical data. The spectroscopic and
通过前面文章中介绍的直接仿生方法,通过对映体纯的二芳基
庚烷前体的氧化环化反应,制备了新型标题化合物的四种立体异构体。异麦角lob碱是天然(+)-和(-)-麦角re碱的甲氧基区域异构体,并首次进行了表征。综合程序建立了绝对的构型,并与脊骨按摩数据具有明确的相关性。异麦角ine碱的光谱和手性数据与
天然产物高度相似。这将允许在仅一种异构体存在下立即指派的单个诊断参数是较高的熔点(大约在50°)的顺式构型的异中心球蛋白。