Synthetic Studies on Condensed-Azole Derivatives. IV. Synthesis and Anti-asthmatic Activities of co-Sulfamoylalkyloxyimidazo(1,2-b)pyridazines.
作者:Masaaki KUWAHARA、Yasuhiko KAWANO、Hiroshi SHIMAZU、Yasuko ASHIDA、Akio MIYAKE
DOI:10.1248/cpb.44.122
日期:——
-2,2-dimethylpropanesulfonam ide (6) showed excellent anti-asthmatic activity and the longest duration of action. The compounds bearing a methyl group at the 7 or 8 position of the imidazo[1,2-b]pyridazine ring were found to have enhanced activity. Among them, 3-(7-methylimidazo[1,2-b]pyridazin-6-yl)oxy-2,2- dimethylpropanesulfonamide (25) showed the most potent inhibitory effect, and its anti-asthmatic
合成了一系列新颖的(咪唑并[1,2-b]哒嗪-6-基)氧基烷基磺酰胺,并评估了其抑制血小板活化因子(PAF)诱导的豚鼠支气管收缩的能力。发现在侧链的氨磺酰基丙氧基的2位上带有宝石二烷基或亚环烷基的化合物具有有效的活性。其中,3-(咪唑并[1,2-b]哒嗪-6-基)氧基-2,2-二甲基丙烷磺酰胺(6)具有优良的抗哮喘活性,且作用时间最长。发现在咪唑并[1,2-b]哒嗪环的7或8位带有甲基的化合物具有增强的活性。其中,3-(7-甲基咪唑并[1,2-b]哒嗪-6-基)氧基-2,2-二甲基丙烷磺酰胺(25)表现出最强的抑制作用,在过敏性哮喘实验模型中的抗哮喘作用优于茶碱。讨论了这一系列化合物中的构效关系。