申请人:Takeda Chemical Industries, Ltd.
公开号:US05155108A1
公开(公告)日:1992-10-13
The imidazo[1,2-b]pyridazine compounds of the formula: ##STR1## wherein R.sub.1 is a hydrogen or halogen atom, or a lower alkyl group optionally having substituent(s), R.sub.2 an R.sub.3 are, independently, a hydrogen atom, a lower alkyl group optionally having substituent(s), a cycloalkyl group or a phenyl group optionally having substituent(s) or R.sub.2 and R.sub.3 together with the adjacent nitrogen atom to which they bond may form a heterocyclic ring optionally having substituent(s), X is an oxygen atom or S(O)n (n=0 to 2), Alk is a straight or branched chain alkylene group containing 1-10 carbon atoms and optionally having substituent(s), or their pharmaceutically acceptable salts which possess antiallergic, anti-inflammatory and anti-PAF activities, and their production and use.
式中R.sub.1为氢原子或卤素原子,或具有取代基的较低烷基基团,R.sub.2和R.sub.3分别为氢原子、具有取代基的较低烷基基团、环烷基基团或苯基基团,或者R.sub.2和R.sub.3与它们结合的相邻氮原子一起可以形成具有取代基的杂环环,X为氧原子或S(O)n(n=0至2),Alk为含有1-10个碳原子并且可能具有取代基的直链或支链烷基基团,或它们的药学上可接受的盐,具有抗过敏、抗炎和抗PAF活性,以及它们的生产和使用。