A series of 3-(aminoalkyl)benzopyrano[3,4-c]pyridin-5-ones was prepared and tested as potential orally active anticholinergic bronchodilators. Inhibition of methacholine-induced collapse in guinea pigs and inhibition of pilocarpine-induced bronchoconstriction in dogs served as in vivo models. Simultaneous measurement of salivary inhibition in the dog model allowed determination of a pulmonary selectivity
制备了一系列3-(
氨基烷基)
苯并
吡喃并[3,4-c]
吡啶基-5-
酮,并测试了它们作为潜在的口服抗
胆碱能支气管扩张剂。在豚鼠中甲
乙酰胆碱诱导的塌陷的抑制和狗
毛果芸香碱诱导的支气管收缩的抑制被用作体内模型。在狗模型中唾液抑制的同时测量允许确定肺的选择性比。通过
苯酚与
哌啶β-
酮酯的Pechman缩合制备
苯并
吡喃并[3,4-c]
吡啶-5-
酮母环系统。用
氨基烷基卤化物或用1-
氯-2-
丙酮烷基化,然后进行还原胺化,得到3-取代的目标化合物。支气管扩张药的效力与围绕侧链末端胺功能的空间拥挤程度有关。将
碳α上的
甲基取代基加到末端胺上通常会提高效力或肺部选择性。在进行二次药理学评估后,选择了命名为CI-923的化合物7a作为支气管扩张药进行临床试验。