Metabolites of the Anaerobic Degradation of
<i>n</i>
‐Hexane by Denitrifying Betaproteobacterium Strain HxN1
作者:Julian Küppers、Nico Mitschke、Simone Heyen、Ralf Rabus、Heinz Wilkes、Jens Christoffers
DOI:10.1002/cbic.201900375
日期:2020.2.3
The constitutions of seven metabolites formed during anaerobic degradation of n-hexane by the denitrifying betaproteobacterium strain HxN1 were elucidated by comparison of their GC and MS data with those of synthetic reference standards. The synthesis of 4-methyloctanoic acid derivatives was accomplished by the conversion of 2-methylhexanoyl chloride with Meldrum's acid. The β-oxoester was reduced
通过反硝化β变形杆菌HxN1菌株在正己烷厌氧降解过程中形成的七种代谢物的组成,通过将它们的GC和MS数据与合成参考标准品进行了比较。4-甲基辛酸衍生物的合成通过将2-甲基己酰氯与麦德鲁姆酸转化而完成。用NaBH4还原β-氧代酸酯,消除羟基,并置换双键,生成4-甲基-3-氧代辛酸酯,3-羟基-4-甲基辛酸酯,(E)-4-甲基酯-2-辛烯酸酯,以及(E)-和(Z)-4-甲基-3-辛烯酸酯。类似地,由丁酰氯和Meldrum酸制备2-甲基-3-氧己酸酯和3-羟基-2-甲基己酸酯的甲酯。然而,通过Horner-Wadsworth-Emmons反应制备(E)-2-甲基-2-己烯酸甲酯,然后异构化为(E)-2-甲基-3-己烯酸甲酯。除了在培养物中无法检测到的4-甲基-3-氧代辛酸酯外,这项研究完成了对正己烷厌氧降解为2-甲基-3-氧代己酰基辅酶A(CoA)的所有中间体的明确鉴定。 ),然后将其硫解切割成