competitive binding assay and three had beta 1-receptor selectivity. Compared to sotalol, a reference class II/III agent, arylpiperazine 7a (4-[(methylsulfonyl)amino]-N-[(4- phenylpiperazin-2-yl)methyl]benzamide) demonstrated beta 1-selectivity and was 1 order of magnitude more potent in the in vitro class III and the beta 1-receptor screens. Compound 7a was evaluated further and found to be effective in
尝试制备一系列新颖的芳基
哌嗪,以将II类(β受体阻滞)和III类抗心律失常特性合并到一个分子中。制备新化合物的关键步骤涉及区域选择性杂环的形成。除四种化合物外,所有化合物均显着延长了犬心脏浦肯野纤维的动作电位持续时间(III类活性)。除一种化合物外,所有化合物均在竞争性结合试验中显示出β受体亲和力,而三种具有β1受体选择性。与
索他洛尔相比,参考II / III类药物芳基
哌嗪7a(4-[((甲基磺酰基)
氨基] -N-[(4-苯基
哌嗪-2-基)甲基]苯甲酰胺)表现出β1选择性,约为1级。在体外III类和β1受体筛选中,更强的效价。