Isolation, Synthesis, and Semisynthesis of Amaryllidaceae Constituents from <i>Narcissus</i> and <i>Galanthus</i> sp.: De Novo Total Synthesis of 2-<i>epi</i>-Narciclasine
作者:Suresh Borra、Ringaile Lapinskaite、Christine Kempthorne、David Liscombe、James McNulty、Tomas Hudlicky
DOI:10.1021/acs.jnatprod.8b00218
日期:2018.6.22
bulbs, separation from haemanthamine, and the occurrence of a trace alkaloid, 2-epi-narciclasine, are reported. Attempts to convert natural narciclasine to its C-2 epimer by Mitsunobu inversion or oxidation/reduction sequences were compromised by rearrangement and aromatization processes, through which a synthesis of the alkaloid narciprimine was achieved. The methylation of the 7-hydroxy group of
一种有效的协议,用于从共同的石蒜科灯泡,从haemanthamine分离水仙环素的分离,和痕量的发生生物碱,2-外延-narciclasine报告。通过Mitsunobu倒置或氧化/还原序列将天然水仙子碱转化为其C-2差向异构体的尝试受到重排和芳构化过程的损害,由此实现了生物碱水仙碱的合成。天然水仙子碱的7-羟基甲基化,然后保护3,4-二醇功能和氧化/还原序列,提供了目标C-2差向异构体。2-甲从头合成化学酶促外延从-narciclasine米还描述了-二溴苯。在含有水仙子碱的水仙和Galanthus球茎的粗提物中很容易检测到山楂胺和那西汀,并且在Galanthus sp中发现了2- epi -narciclasine作为痕量天然产物。是第一次报告。