(H+, K+)-ATPase inhibiting 2-[(2-pyridylmethyl)sulfinyl]benzimidazoles. 4. A novel series of dimethoxypyridyl-substituted inhibitors with enhanced selectivity. The selection of pantoprazole as a clinical candidate
作者:Bernhard Kohl、Ernst Sturm、Joerg Senn-Bilfinger、W. Alexander Simon、Uwe Krueger、Hartmann Schaefer、Georg Rainer、Volker Figala、Kurt Klemm
DOI:10.1021/jm00084a010
日期:1992.3
[(Pyridylmethyl)sulfinyl]benzimidazoles 1 (PSBs) are a class of highly potent antisecretory (H+,K+)-ATPase inhibitors which need to be activated by acid to form their active principle, the cyclic sulfenamide 4. Selective inhibitors of the (H+,K+)-ATPase in vivo give rise to the nonselective thiophile 4 solely at low pH, thus avoiding interaction with other thiol groups in the body. The propensity to
[(吡啶基甲基)亚磺酰基]苯并咪唑1(PSBs)是一类高度有效的抗分泌(H +,K +)-ATPase抑制剂,需要通过酸激活才能形成其活性成分,即环亚磺酰胺4。(H + ,K +)-ATPase在体内仅在低pH时会产生非选择性的亲硫基4,从而避免了与体内其他巯基的相互作用。进行酸催化转化的倾向取决于2形成中所涉及的官能团的亲核/亲电性质,因为该步骤既决定速率又取决于pH。这项研究的目的是鉴定在具有酸性pH值的刺激胃腺中具有高(H +,K +)-ATPase抑制活性的化合物,但在体外pH值(Na +,K +)-ATPase抑制活性。仔细研究了所有衍生物中存在的吡啶4-甲氧基取代基侧面的取代基的关键影响。3-甲氧基的引入使得抑制剂具有与奥美拉唑和兰索拉唑相似的高效力组合,但是增加了稳定性。这些研究的结果是,化合物1a(INN top托拉唑)被选作候选药物,目前正在进行III期临床研究。