Bioactive Nitronaphthalenes from an Endophytic Fungus,<i>Coniothyrium</i>sp., and Their Chemical Synthesis
作者:Karsten Krohn、Simeon F. Kouam、Stephan Cludius-Brandt、Siegfried Draeger、Barbara Schulz
DOI:10.1002/ejoc.200800255
日期:2008.7
known from chemical synthesis but new as natural products, were isolated together with two known compounds, 1-hydroxy-5-methoxynaphthalene (1) and ergosterol (6) from an endophytic fungus, Coniothyrium sp. The structures of 1–6 were determined by spectroscopic methods including 1D and 2D NMR experiments and by mass spectrometric measurements. The structures of 1–4 were confirmed by chemical synthesis
四种天然硝基代谢物,1-羟基-5-甲氧基-2-硝基萘 (2)、1,5-二甲氧基-4-硝基萘 (3)、1-羟基-5-甲氧基-2,4-二硝基萘 (4)、和 1,5-二甲氧基-4,8-二硝基萘 (5),从化学合成中已知,但作为天然产物是新的,与两种已知化合物 1-羟基-5-甲氧基萘 (1) 和麦角甾醇 (6) 一起从一种内生真菌 Coniothyrium sp。1-6 的结构是通过光谱方法确定的,包括 1D 和 2D NMR 实验以及质谱测量。化学合成证实了1-4的结构。硝基萘酚表现出显着的抗菌、抗真菌和抗藻类特性。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)