Novel fatty acid methyl esters from the actinomycete <i>Micromonospora aurantiaca</i>
作者:Jeroen S Dickschat、Hilke Bruns、Ramona Riclea
DOI:10.3762/bjoc.7.200
日期:——
structures for all FAMEs have been suggested based on their mass spectra and on a retention index increment system and verified by the synthesis of key reference compounds. In addition, the structures of two FAMEs, methyl 4,8-dimethyldodecanoate and the ethyl-branched compound methyl 8-ethyl-4-methyldodecanoate were deduced from their mass spectra. Feeding experiments with isotopically labelled [(2)H(10)]leucine
Micromonospora aurantiaca 释放的挥发物通过闭环汽提装置 (CLSA) 收集并通过 GC-MS 进行分析。顶空提取物包含来自不同类别的 90 多种化合物。脂肪酸甲酯 (FAME) 包括主要化合物类别,包括饱和无支链、单甲基和二甲基支链 FAME,具有不同的结构变体:未支化、α-支化、γ-支化、(omega-1)-支化、(omega-2)-分支、α-和 (omega-1)-分支、γ-和 (omega-1)-分支、γ-和 (omega-2)-分支以及γ-和 (omega-3)-分支的 FAME。前三种类型的 FAME 之前没有从自然资源中描述过。所有 FAME 的结构都是根据其质谱和保留指数增量系统提出的,并通过关键参考化合物的合成进行验证。此外,还从质谱中推导出了两种 FAME,即 4,8-二甲基十二酸甲酯和乙基支化化合物 8-乙基-4-甲基十二酸甲酯的结构。用同位素标记的