Dioncophyllines C<sub>2</sub>, D<sub>2</sub>, and F and Related Naphthylisoquinoline Alkaloids from the Congolese Liana<i>Ancistrocladus ileboensis</i>with Potent Activities against<i>Plasmodium falciparum</i>and against Multiple Myeloma and Leukemia Cell Lines
作者:Jun Li、Raina Seupel、Doris Feineis、Virima Mudogo、Marcel Kaiser、Reto Brun、Daniela Brünnert、Manik Chatterjee、Ean-Jeong Seo、Thomas Efferth、Gerhard Bringmann
DOI:10.1021/acs.jnatprod.6b00967
日期:2017.2.24
Dioncophylline F (1), the first 5,8′-coupled dioncophyllaceous alkaloid (i.e., lacking an oxygen function at C-6 and possessing an R-configuration at C-3), was isolated from the recently described Congolese liana Ancistrocladus ileboensis. Two further, likewise Dioncophyllaceae-type, alkaloids, the dioncophyllines C2 (2) and D2 (3), were identified, along with the Ancistrocladaceae-type compound ancistrocladisine
从最近描述的刚果藤上藤本Ancistrocladus ileboensis中分离到了第一个5,8'偶合的二糖类生物碱Dioncophylline F(1)(即在C-6处没有氧功能,在C-3处具有R构型)。两个另外,同样地双钩叶科型,生物碱,所述dioncophyllinesÇ 2(2)和d 2(3),进行了鉴定,与钩枝藤科型化合物ancistrocladisine B(沿4),这是在C-6和含氧小号-配置在C-3。新化合物的结构通过光谱,化学和手性方法确定。的立体结构通过全合成进一步证实了1。由于缺少在其联芳基轴上邻位的甲基,二oncophylline F(1)和7,8'偶联的dioncophylline D 2(3)都以成对的半稳定态出现,因此,它们之间缓慢地相互转化。非对映异构体,而具有5,1'-键的二茶碱C 2(2)在轴上构型稳定。从ileboensis中分离出八种已知的萘异喹啉,其中二茶碱A(P