synthesized by reaction of the lithium enolate of the 3-methoxycarbonyl compounds followed by ester hydrolysis and decarboxylation. The receptor-binding affinity and efficacy of these compounds as muscarinic ligands was assessed by radioligand binding assays using [3H]-N-methylscopolamine and [3H]oxotremorine-M. Optimal agonist affinity was observed for 3'-methyl compounds. Smaller substituents (H) retained
制备了一系列在C5带有单或双环胺的新型
1,2,4-噻二唑。通过3-甲
氧基羰基化合物的
烯醇
锂反应,然后进行
酯水解和
脱羧反应,合成了
奎尼丁和1-
氮杂
双环[2.2.1]庚烷衍
生物。这些化合物作为毒蕈碱
配体的受体结合亲和力和功效通过使用[3H] -N-
甲基东pol碱和[3H]
氧代短发胺-M的放射性
配体结合测定法进行评估。对于3'-
甲基化合物观察到最佳激动剂亲和力。较小的取代基(H)保留了较低亲和力的功效,而较大的基团则导致实质上较低的功效。观察到的结合亲和力受围绕C3-C5'键旋转的构象能以及单环或双环胺的空间要求的影响。