作者:Karsten Krohn、Simeon F. Kouam、Guy M. Kuigoua、Hidayat Hussain、Stephan Cludius-Brandt、Ulrich Flörke、Tibor Kurtán、Gennaro Pescitelli、Lorenzo Di Bari、Siegfried Draeger、Barbara Schulz
DOI:10.1002/chem.200900749
日期:2009.11.9
related to α‐diversolonic ester (13) from Microdiplodia sp.. The structures were determined mainly by extensive 1D and 2D NMR experiments and supported by X‐ray single‐crystal analysis of 1 and the oxidation product 7. The absolute configurations of the microsphaeropsones A–C (1–3) were established by comparison of the electronic and vibrational circular dichroism (ECD and VCD) spectra of 1 with time‐dependent
三个新的代谢物,microsphaeropsones A-C(1 - 3)具有独特的多塞平〔2,3- b ]苯并吡喃-6-酮(环放大呫吨酮)骨架,从该内生真菌分离Microsphaeropsis种,同现他们推定的生物遗传蒽醌前体citreorosein(4)和大黄素(5)。从另一个Microsphaeropsis物种,大量fusidienol A(的8),较少量大黄素(的5)中,已知的芳族氧杂蒽酮9和9b中,新的3,4- dihydrofusidienol A(图8b),和新的芳族黄酮9 c被隔离了。内生菌毛孢霉菌种产生了一种新的芳族x吨酮,seimatoxanthoneA(10)和3,4-dihydroglobosuxanthone A(12),与Microdiplodia sp。的α-diversolonic酯(13)密切相关。其结构主要由广泛的1D决定。和2D NMR实验,并得到1和