Synthetic Studies on Condensed-Azole Derivatives. V. Synthesis and Anti-asthmatic Activities of .OMEGA.-Sulfamoylalkyloxy(1,2,4)triazolo(1,5-b)pyridazines.
作者:Masaaki KUWAHARA、Yasuhiko KAWANO、Masahiro KAJINO、Yasuko ASHIDA、Akio MIYAKE
DOI:10.1248/cpb.45.1447
日期:——
A series of novel ([1, 2, 4]triazolo[1, 5-b]pyridazin-6-yl)oxyalkylsulfonamides was synthesized and evaluated for the ability to inhibit platelet activating factor (PAF)-induced bronchoconstriction in guinea pigs. The compounds bearing a gem-dialkyl or a cycloalkylidene group at the 2 position of the sulfamoylpropyloxy group in the side chain and a methyl group at the 7 position were found to have potent activity. Among them, 2, 2-diethyl-3-(7-methyl[1, 2, 4]-triazolo[1, 5-b]pyridazin-6-yl)oxypropanesulfonamide (13) showed excellent anti-asthmatic activity. Compounds 13 may be of significant value in the treatment of asthma and other respiratory diseases. The structure-activity relationships in this series of compounds are discussed.
一系列新型[1, 2, 4]三唑并[1, 5-b]吡哒嗪-6-基氧烷基磺酰胺被合成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。在侧链中,在磺酰氨基丙氧基的2位带有双烷基或环烷基亚基团以及在7位带有甲基的化合物显示出强效活性。其中,2, 2-二乙基-3-(7-甲基[1, 2, 4]三唑并[1, 5-b]吡哒嗪-6-基)氧丙烷磺酰胺(13)表现出优异的抗哮喘活性。化合物13可能在治疗哮喘和其他呼吸系统疾病方面具有重要价值。讨论了该系列化合物的构效关系。