Synthesis of selectively labeled histidine and its methylderivatives with deuterium, tritium, and carbon-14
作者:J. Šamonina-Kosicka、M. Kańska
DOI:10.1002/jlcr.3027
日期:2013.5.30
Isotopologues of l-histidine and its N-methylderivatives labeled with deuterium and tritium at the 5-position in the imidazole ring were obtained using the isotope exchange method. The deuterium-labeled isotopologues [5-(2)H]-l-histidine, [5-(2)H]-N(τ) -methyl-l-histidine, [5-(2)H]-N(π) -methyl-l-histidine, and [2,5-(2)H(2)]-l-histidine were synthesized by isotope exchange method carried out in a fully
使用同位素交换方法获得了在咪唑环的 5 位用氘和氚标记的 L-组氨酸及其 N-甲基衍生物的同位素体。氘标记的同位素体 [5-(2)H]-l-组氨酸、[5-(2)H]-N(τ)-甲基-l-组氨酸、[5-(2)H]-N(π )-甲基-l-组氨酸和[2,5-(2)H(2)]-l-组氨酸通过同位素交换法在完全氘化的培养基中合成。应用相同的反应条件合成[5-(3)H]-N(τ)-甲基-1-组氨酸、[5-(3)H]-N(π)-甲基-1-组氨酸和[ 5-(3)H]-l-组氨酸的比活性分别为 2.0、5.0 和 2.6 MBq/mmol。N(π) -[甲基-(14)C]-组胺通过[(14)C]碘甲烷直接甲基化组胺,在一步反应中得到比活性为0.23 MBq/mmol的比活。