Novel functional M1 selective muscarinic agonists. 2. Synthesis and structure-activity relationships of 3-pyrazinyl-1,2,5,6-tetrahydro-1-methylpyridines. Construction of a molecular model for the M1 pharmacophore
作者:John S. Ward、Leander Merritt、V. J. Klimkowski、M. L. Lamb、C. H. Mitch、F. P. Bymaster、B. Sawyer、H. E. Shannon、Preben H. Olesen
DOI:10.1021/jm00100a005
日期:1992.10
relatively devoid of M3 agonist activity as determined by its lack of tremorogenic and sialogogic effects in mice. A comparison of the M1 agonist efficacy of these pyrazines and related 1,2,5-thiadiazoles and 1,2,5-oxadiazoles suggested that M1 efficacy was related to the magnitude of electrostatic potential located over the nitrogens of the respective heterocycles. The heteroatom directly attached to the
合成了一系列的3-(3-取代的吡嗪基)-1,2,5,6-四氢-1-甲基吡啶,它们对中央毒蕈碱受体具有高亲和力。这些化合物中的一些抑制豚鼠输精管的电刺激抽搐的能力表明该化合物是M1激动剂。M1激动剂活性与连接到吡嗪环的侧链的长度有关,最大的活性是通过己氧基侧链获得的。(己氧基)吡嗪3f缺乏M2激动剂活性,因为它不能影响豚鼠心房,并且由于其在小鼠中缺乏震颤和唾液酸作用,因此也相对缺乏M3激动剂活性。这些吡嗪和相关的1,2,5-噻二唑和1,2,5-恶二唑表明,M1的功效与位于各个杂环氮上的静电势的大小有关。直接连接到吡嗪或1,2,5-噻二唑杂环的3位的杂原子通过确定围绕连接四氢吡啶基环和杂环的键旋转的能量有利地构象异构体,显着影响化合物的M1效力。基于计算研究和舒尔曼提出的毒蕈碱药效基团的模型,建立了一个M1活化药效基团的三维模型。5-噻二唑杂环通过确定围绕连接四氢吡啶基环和杂环的键旋转的能量有