Labelling of the guanylate cyclase activator cinaciguat (BAY 58-2667) with carbon-14, tritium and stable isotopes
作者:D. Seidel、U. Pleiß
DOI:10.1002/jlcr.1738
日期:2010.3
For studies of pharmacokinetics and drug metabolism of the new soluble guanylate cyclase activator cinaciguat (BAY 58-2667) the 14C-labelled compound was synthesized. The tritiated compound was required to elucidate the mode of action and the stable labelled compound was required for bio-analytical studies by quantitative mass spectrometry as well. Two radiosyntheses are described with different formation of the labelled intermediate 1-(chloro[14C]methyl)-4-(2-phenylethyl)benzene. The first one started with 14C-carboxylation of 1-bromo-4-(2-phenylethyl)benzene yielding the desired product in 5 steps. In the second synthesis intermediate 1-(chloro[14C]methyl)-4-(2-phenylethyl)benzene was formed by chloromethylation of bibenzyl with [14C]paraformaldehyde/hydrochloric acid subsequently resulting in the final product in three steps. Tritium labelling was performed by tritium exchange of the diester intermediate using an organo-iridium catalyst and subsequent saponification. The stable labelled compound was synthesized via a convergent synthesis starting with 13C,15N-cyanation of 1-(chloromethyl)-2-[4-(2-phenylethyl)benzyl]oxy}benzene and 13C-cyanation of methyl 4-bromobenzoate, respectively. The labelled product was obtained after 7 chemical steps. Copyright © 2010 John Wiley & Sons, Ltd.
为了研究新型可溶性鸟苷酸环化酶激活剂西那西瓜酯(BAY 58-2667)的药代动力学和药物代谢,合成了 14C 标记的化合物。需要三价化合物来阐明其作用模式,还需要稳定的标记化合物来进行定量质谱生物分析研究。本文介绍了两种放射性合成方法,其标记中间体 1-(氯[14C]甲基)-4-(2-苯基乙基)苯的形成过程各不相同。第一种合成是从 1-溴-4-(2-苯基乙基)苯的 14C 羧化开始,经过 5 个步骤得到所需的产物。在第二种合成方法中,中间体 1-(氯[14C]甲基)-4-(2-苯基乙基)苯是通过氯甲基化联苄与[14C]多聚甲醛/盐酸反应形成的,随后经过三个步骤得到最终产物。使用有机铱催化剂对二酯中间体进行氚交换,然后进行皂化,从而进行氚标记。稳定的标记化合物是分别从 1-(氯甲基)-2-[4-(2-苯基乙基)苄基]氧基}苯的 13C、15N-氰化反应和 4-溴苯甲酸甲酯的 13C 氰化反应开始,通过聚合合成法合成的。经过 7 个化学步骤后得到了标记产品。Copyright © 2010 John Wiley & Sons, Ltd. All Rights Reserved.