Decalactone derivatives from corynespora cassiicola, an endophytic fungus of the mangrove plant laguncularia racemosa
文献类型: 外文期刊
第一作者: Mandi, Attila
作者: Mandi, Attila;Kurtan, Tibor;Ebrahim, Weaam;Aly, Amal H.;Proksch, Peter;Debbab, Abdessamad;Ebrahim, Weaam;Totzke, Frank;Kubbutat, Michael H. G.;Wray, Victor;Lin, Wen-Han;Dai, Haofu
作者机构:
关键词: Conformation analysis;Drug discovery;Fungi;Lactones;Medicinal chemistry;Natural products;Structure elucidation
期刊名称:EUROPEAN JOURNAL OF ORGANIC CHEMISTRY ( 影响因子:3.021; 五年影响因子:2.79 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Chemical investigation of the ethyl acetate extract of Corynespora cassiicola, isolated from leaf tissues of the Chinese mangrove medicinal plant Laguncularia racemosa, yielded four new secondary metabolites, including three decalactones, xestodecalactones D-F (1-3) as well as corynesidone C (4), in addition to four known compounds. The structures of the new compounds were determined on the basis of one- and two-dimensional NMR spectroscopy as well as by high-resolution mass spectrometry. Absolute configurations of the optically active compounds 1-3 were determined by TDDFT ECD calculations of their solution conformers, proving that they belong to the (11S) series of xestodecalactones, opposite to the (11R) configuration of the known xestodecalactones A-C. All compounds were tested against a panel of human protein kinases. Among the isolated compounds, two inhibited several kinases such as IGF1-R and VEGF-R2 with IC _(50) values mostly in the low micromolar range. Three new xestodecalactones D-F (1-3) and a new corynesidone C were isolated from Corynespora cassiicola. The structures were determined by 1D and 2D NMR spectroscopy as well as by high-resolution mass spectrometry. The absolute configurations of 1-3 were determined by TDDFT ECD calculations. All compounds were tested against a panel of human protein kinases.
分类号: O62
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