Transformations of the 2,7-<i>Seco Aspidosperma</i> Alkaloid Leuconolam, Structure Revision of <i>epi</i>-Leuconolam, and Partial Syntheses of Leuconoxine and Leuconodines A and F
作者:Yun-Yee Low、Fong-Jiao Hong、Kuan-Hon Lim、Noel F. Thomas、Toh-Seok Kam
DOI:10.1021/np400922x
日期:2014.2.28
reaction resulted in cyclization to yield two epimers, the major product corresponding to the optical antipode of a (+)-meloscine derivative. The structures and relative configuration of the products were confirmed by X-ray diffraction analysis. Reaction of leuconolam and epi-leuconolam with various acids, molecular bromine, and hydrogen gave results that indicated that the structure of the alkaloid, previously
进行了山梨曲霉精子生物碱亮酮抗生物素的几种转化。基于碱基的诱导反应导致环化,产生两个差向异构体,主要产物对应于(+)-meloscine衍生物的旋光对映体。通过X射线衍射分析确认了产物的结构和相对构型。leuconolam和的反应外延-leuconolam用各种酸,分子溴,和氢给那表明生物碱,先前分配为一体的结构导致外延-leuconolam,是不正确的。这是通过X射线衍射分析,这表明证实外延-leuconolam实际上是6,7-dehydroleuconoxine。进行了二氮杂螺并吲哚生物碱亮conoxoxine和新的leuconoxine型生物碱leuconodines A和F的短部分合成。