inhibitors of gastric acid secretion induced by histamine in anesthetized dogs. Of these compounds, furan (8c) and [(diaminomethylene)amino]thiazole derivatives (16c) were found to be more potent than cimetidine in both assays. In contrast to the guanidine series, methyl substitution at the terminal nitrogen of the cyano amidines was detrimental to the activities. Furthermore, acid hydrolysis of the cyano amidines
                                    制备了大量的N-
氰基am衍
生物作为潜在的
组胺H2受体拮抗剂,并评估了它们对
组胺刺激豚鼠离体右心房变时反应的抑制作用。评价了几种选择的化合物作为
组胺在麻醉狗中诱导的胃酸分泌的
抑制剂。这些化合物中,
呋喃(8c)和[(二
氨基亚甲基)
氨基]
噻唑衍
生物(16c)在两种测定中均比
西咪替丁更有效。与
胍系列相反,在
氰基am的末端氮上的甲基取代对活性是有害的。此外,
氰基am的酸
水解得到
氨基甲酰基am,其被证明比
氰基am具有更高的活性,与
胍的情况相反。