Synthesis of deuterium and C-13-labelled ethyl glycolate and their subsequent use in the synthesis of labelled analogues of the DNA adduct O6-carboxymethyl-2′-deoxyguanosine
作者:Sharon A. Moore、David E. G. Shuker
DOI:10.1002/jlcr.1923
日期:2011.12
The adduct O6-carboxymethyl-2′-deoxyguanosine (O6CMdG) is of importance as it has been previously linked to high red meat diet in humans, and as yet, a liquid chromatography-mass spectrometry (LC-MS) method has not been developed due to lack of appropriate standards. The synthesis of the deuterated and C-13 analogues required the use of [2H2]- and [13C2]ethyl glycolate to label the carboxymethyl moiety of O6CMdG. [2H2]Ethyl glycolate was synthesised via acid hydrolysis of ethyl diazoacetate using deuterated solvents (59% yield), whilst [13C2]ethyl glycolate was synthesised from [13C2]glycine in a three-step procedure (35% yield). The labelled ethyl glycolates were then used to synthesise [2H2]- and [13C2]O6CMdG for future use as internal standards in the LC-MS analysis of biological samples. Copyright © 2011 John Wiley & Sons, Ltd.
加合物 O6-羧甲基-2′-脱氧鸟苷(O6CMdG)非常重要,因为它曾与人类的高红肉饮食有关,但由于缺乏适当的标准,至今尚未开发出液相色谱-质谱(LC-MS)方法。合成氚代和 C-13 类似物需要使用[2H2]-和[13C2]乙醇酸乙酯来标记 O6CMdG 的羧甲基。[2H2]Ethyl glycolate 是通过使用氚代溶剂对重氮乙酸乙酯进行酸水解合成的(产率为 59%),而 [13C2]ethyl glycolate 则是通过三步法从 [13C2]glycine 合成的(产率为 35%)。标记的乙醇酸乙酯随后被用于合成 [2H2]- 和 [13C2]O6CMdG,以便将来在生物样本的 LC-MS 分析中用作内标。版权 © 2011 John Wiley & Sons, Ltd. 保留所有权利。