Nicotinamide Derivatives as a New Class of Gastric H<sup>+</sup>/K<sup>+</sup>-ATPase Inhibitors. 1. Synthesis and Structure−Activity Relationships of <i>N</i>-Substituted 2-(Benzhydryl- and benzylsulfinyl)nicotinamides
作者:Hideo Terauchi、Akihiko Tanitame、Keiko Tada、Keiji Nakamura、Yasuhiro Seto、Yoshinori Nishikawa
DOI:10.1021/jm9605593
日期:1997.1.1
compounds are converted into their active forms, 2,3-dihydro-3-oxoisothiazolo[5,4-b]pyridines 5, which inhibit gastric H+/K(+)-ATPase. Inhibitory activities against [14C]aminopyrine accumulation stimulated by dibutyryl cAMP in isolated rabbit parietal cells in vitro and histamine-induced gastric acid secretion in pylorus-ligated rats by intraduodenal administration in vivo were evaluated, and the structure-activity
合成了一系列新的N-取代的2-(苯甲酰基-和苄基亚磺酰基)烟酰胺7和8。在顶细胞的酸性环境中进行酸活化后,这些化合物会转化为活性形式2,3,2-二氢-3-氧代异噻唑并[5,4-b]吡啶5,从而抑制胃H + / K(+)- ATP酶。评价了由丁二酰cAMP刺激的离体兔壁细胞在体外对[14C]氨基比林积累的抑制活性,以及体内十二指肠内给药对幽门结扎的大鼠中组胺诱导的胃酸分泌的影响,并研究了其构效关系。在合成的化合物中,2-[((2,4-二甲氧基苄基)亚磺酰基] -N-(4-吡啶基)烟酰胺(8b)在体内和体外表现出与奥美拉唑相同的有效抑制活性,而奥美拉唑是典型的H + / K( +)-ATPase抑制剂。此外,8b在中性和弱酸性pH下比奥美拉唑,兰索拉唑和pan托拉唑更稳定。化合物8b被认为是治疗与酸有关的胃肠道疾病的有前途的药物。