92155-95-8

Usage

InChI:InChI=1/C13H24O4/c1-5-8-10(4)9-11(12(14)16-6-2)13(15)17-7-3/h10-11H,5-9H2,1-4H3

Upstream product

• 996-82-7 sodium diethylmalonate 
• 25346-33-2 1-bromo-2-methylpentane 
• 31294-94-7 2-methylpentanyl iodide 
• 854833-30-0 (2-methyl-pentylidene)-malonic acid diethyl ester 
• 55898-43-6 methylpropylpropanedioic acid diethyl ester 
• 39255-32-8 manzanate 
• 105-53-3 diethyl malonate 
• 123-15-9 2-methylvaleraldehyde 
• 105-30-6 2-methylpentan-1-ol 
• 64-17-5 ethanol 

Downstream Products

• 3302-03-2 4-Methyl-heptansaeure 
• 88467-55-4 1-bromo-4-methylheptane 
• 817-91-4 4-methyl-1-heptanol 

Relevant academic research and scientific papers

Synthesis and mass spectra of rearrangement bio-signature metabolites of anaerobic alkane degradation via fumarate addition

Metabolite profiling in anaerobic alkane biodegradation plays an important role in revealing activation mechanisms. Apart from alkylsuccinates, which are considered to be the usual biomarkers via fumarate addition, the downstream metabolites of C-skeleton rearrangement can also be regarded as biomarkers. However, it is difficult to detect intermediate metabolites in both environmental samples and enrichment cultures, resulting in lacking direct evidence to prove the occurrence of fumarate addition pathway. In this work, a synthetic method of rearrangement metabolites was established. Four compounds, namely, propylmalonic acid, 2-(2-methylbutyl)malonic acid, 2-(2-methylpentyl)malonic acid and 2-(2-methyloctyl)malonic acid, were synthesized and determined by four derivatization approaches. Besides, their mass spectra were obtained. Four characteristic ions were observed at m/z 133 + 14n, 160 + 28n, 173 + 28n and [M - (45 + 14n)]+ (n = 0 and 2 for ethyl and n-butyl esters, respectively). For methyl esterification, mass spectral features were m/z 132, 145 and [M - 31]+, while for silylation, fragments were m/z 73, 147, 217, 248, 261 and [M - 15]+. These data provide basis on identification of potential rearrangement metabolites in anaerobic alkane biodegradation via fumarate addition.

Do enzymes recognise remotely located stereocentres? Highly enantioselective Candida rugosa lipase-catalysed esterification of the 2- to 8-methyldecanoic acids

Several racemic methyl decanoic acids have been synthesised and successfully resolved in esterification with 1-hexadecanol at aw=0.8 in cyclohexane using immobilised Candida rugosa lipase (CRL) as the catalyst. The enantiomeric ratios (E=2.8-68) obtained were surprisingly high even when the methyl group was as remotely located as in 8-methyldecanoic acid (E=25). Interestingly, the lipase shows enantiopreference for the S-enantiomer when the methyl group is located on even numbered carbons i.e. for the 2-,4-,6- and 8-methyldecanoic acids and to the R-enantiomer when the methyl group is located on uneven numbered carbons i.e. for the 3-,5- and 7-methyldecanoic acids.