Volatiles released by the marine Roseobacter clade bacterium Rugeria pomeroyi were collected by use of a closed-loop stripping headspace apparatus (CLSA) and analysed by GC–MS. Several lactones were found for which structural proposals were derived from their mass spectra and unambiguously verified by the synthesis of reference compounds. An enantioselective synthesis of two exemplary lactones was performed to establish the enantiomeric compositions of the natural products by enantioselective GC–MS analyses. The lactones were subjected to biotests to investigate their activity against several bacteria, fungi, and algae. A specific algicidal activity was observed that may be important in the interaction between the bacteria and their algal hosts in fading algal blooms.
通过使用闭环吸附顶空装置(CL
SA)收集了由海洋
Roseobacter类细菌
Rugeria pomeroyi释放的挥发性物质,并通过GC-MS进行了分析。发现了几种内酯,根据它们的质谱推导出了结构建议,并通过合成参考化合物进行了明确验证。进行了两种示范性内酯的对映选择性合成,以通过对映选择性GC-MS分析确定
天然产物的对映构成。将内酯进行
生物测试,以研究其对几种细菌、真菌和藻类的活性。观察到了特定的杀藻活性,这可能在细菌与藻类寄主之间的相互作用中起重要作用,尤其是在褪色藻类
水华中。