Pyridinium Oximes with <i>Ortho</i>-Positioned Chlorine Moiety Exhibit Improved Physicochemical Properties and Efficient Reactivation of Human Acetylcholinesterase Inhibited by Several Nerve Agents
作者:Tamara Zorbaz、David Malinak、Nikola Maraković、Nikolina Maček Hrvat、Antonio Zandona、Michal Novotny、Adam Skarka、Rudolf Andrys、Marketa Benkova、Ondrej Soukup、Maja Katalinić、Kamil Kuca、Zrinka Kovarik、Kamil Musilek
DOI:10.1021/acs.jmedchem.8b01398
日期:2018.12.13
bispyridinium mono-oximes, analogous to potent charged reactivators K027, K048, and K203, were synthesized with the aim of improving lipophilicity and reducing the pKa value of the oxime group, thus resulting in a higher oximate concentration at pH 7.4 compared to nonchlorinated analogues. The nucleophilicity was examined and the pKa was found to be lower than that of analogous nonchlorinated oximes. All
合成了六种氯化双吡啶鎓单肟,类似于强效带电活化剂K027,K048和K203,目的是改善亲脂性并降低肟基的p K a值,因此与pH 7.4相比,肟酸的浓度更高非氯化类似物。检查了亲核性,并且p K a被发现低于类似的非氯化肟。所有这些新化合物都能有效地激活被神经毒剂环沙林,沙林和VX抑制的人AChE。最有效的是肟K027的二氯类似物,由于结合亲和力和分子识别能力的提高,具有显着提高的活化共轭酶的能力。沙林,VX和环沙蛋白抑制的AChE的整体重新活化分别比K027高3倍,7倍和8倍。它的通用性,PAMPA渗透性,有利的酸解离常数及其微不足道的细胞毒性作用,以及在全人类血液中成功地离体清除神经毒剂,都需要对该化合物作为有机磷中毒的解毒剂进行进一步分析。