Cardioselective Antiischemic ATP-Sensitive Potassium Channel Openers. 4. Structure−Activity Studies on Benzopyranylcyanoguanidines: Replacement of the Benzopyran Portion
作者:Karnail S. Atwal、Francis N. Ferrara、Charles Z. Ding、Gary J. Grover、Paul G. Sleph、Steven Dzwonczyk、Anne J. Baird、Diane E. Normandin
DOI:10.1021/jm950646f
日期:1996.1.1
The results of our efforts aimed at the replacement of the benzopyran ring of the lead cardiac selective antiischemic ATP-sensitive potassium channel (KATP) opener (4) are described. Systematic modification of the benzopyran ring of 4 resulted in the discovery of a structurally simpler acyclic analog (8) with slightly lower antiischemic potency than the lead compound 4. Further structure-activity studies
描述了我们旨在替换先导心脏选择性抗缺血性ATP敏感性钾通道(KATP)开启剂(4)的苯并吡喃环的努力结果。对苯并吡喃环4的系统修饰导致发现结构简单的无环类似物(8),其抗缺血能力比先导化合物4略低。对无环类似物8的进一步结构活性研究提供了2-苯氧基-3-吡啶基脲类似物18与基于苯并吡喃的化合物4相比具有更高的抗缺血能力和选择性。这些数据表明,苯并吡喃环4及其同类物对于抗缺血活性和心脏选择性不是强制性的。本文描述的结果还表明,对于苯并吡喃类化合物,KATP开启剂的抗缺血和血管舒张活性的结构活性关系是截然不同的。无环类似物(例如18)的作用机制似乎仍涉及KATP的开放,因为通过用KATP阻断剂格列本脲预处理可以取消其心脏保护作用。