New naphthoquinones and a new δ-lactone produced by endophytic fungi from Costa Rica.

New naphthoquinones and a new δ-lactone produced by endophytic fungi from Costa Rica.
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DOI:
10.1016/j.tetlet.2010.11.159
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发表时间:
2011-04-27
影响因子:
1.8
通讯作者:
Clardy, Jon
Clardy, Jon
中科院分区:
化学4区
文献类型:
--
作者:
Cao, Shugeng;Clardy, Jon

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在寻找具有抗疟活性的化合物的过程中,从哥斯达黎加的一种内生真菌Delitzchia winteri中分离得到两个新的萘醌类化合物,delitzchianones A(1)和B(2)。同样的搜索还导致了一个新的8-乙酰氧基pestalopyrone(3)和已知的化合物,pestalopyrone(4)从另一个哥斯达黎加内生真菌,Phomatospora bellaminuta。化合物1、2、3的结构经核磁共振谱和质谱确证。在生长/无生长Dd 2测定中测试所有四种化合物的活性,但仅化合物4具有可测量的活性,IC 50值为37 μM。
While searching for compounds with antimalarial activity, two new naphthoquinones, delitzchianones A (1) and B (2), were separated from Delitzchia winteri, an endophytic fungus from Costa Rica. The same search also led to a new 8-acetoxy pestalopyrone (3) and the known compound, pestalopyrone (4) from another Costa Rican endophytic fungus, Phomatospora bellaminuta. The structures of the three new compounds 1, 2 and 3 were established with extensive NMR and MS analyses. All four compounds were tested for activity in a growth / no growth Dd2 assay, but only compound 4 had measurable activity with an IC50 value of 37 μM.
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期刊: ORGANIC LETTERS
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