Synthesis of
<sup>13</sup>
C‐labelled cutin and suberin monomeric dicarboxylic acids of the general formula HO
<sub>2</sub>
<sup>13</sup>
C‐(CH
<sub>2</sub>
)
<sub>n</sub>
‐
<sup>13</sup>
CO
<sub>2</sub>
H (
<i>n</i>
= 10, 12, 14, 16, 18, 20, 22, 24, 26, 28)
作者:Carina Schink、Sandra Spielvogel、Wolfgang Imhof
DOI:10.1002/jlcr.3885
日期:2021.1
13C-labeled dicarboxylic acids HO213C-(CH2)n-13CO2H (n = 10, 12, 14, 16, 18, 20, 22, 24, 26, 28) have been synthesized as internal standards for LC-MS and GC-MS analysis of cutin and suberin monomer degradation by soil-based microorganisms. Different synthetic strategies had to be applied depending on the chain length of the respective synthetic target and because of economic considerations. 13C-labels were introduced by nucleophilic substitution of a suitable leaving group with labelled potassium cyanide and subsequent hydrolysis of the nitriles to produce the corresponding dicarboxylic acids. All new compounds are characterized by GC/MS, IR, and NMR methods as well as by elemental analysis.
合成了13C标记的二羧酸 HO213C-(CH2)n-13CO2H(n = 10, 12, 14, 16, 18, 20, 22, 24, 26, 28),作为土壤微生物降解角质素和木栓素单体分析的LC-MS和GC-MS内部标准。根据各合成目标的链长及经济考虑,必须采用不同的合成策略。通过用标记的氰化钾核取代适当的离去基团,并随后水解腈类化合物以生成相应的二羧酸,引入了13C标记。所有新化合物均通过GC/MS、红外光谱(IR)和核磁共振(NMR)方法以及元素分析进行了表征。