Pyrimido (4,5-c)pyridazines, compositions containing them and processes for their preparation
申请人:THE WELLCOME FOUNDATION LIMITED
公开号:EP0000382A1
公开(公告)日:1979-01-24
Pyrimido (4,5-c) pyridazines of formula I and compounds of formulae II, III, IV, V.
wherein R' is benzyl or alkyl optionally substituted by hydroxy; R2 is hydrogen, hydroxy, methyl, hydroxymethyl, optionally substituted benzyl, optionally substituted phenacyl, a group CH(Y)CO2Z in which Y is hydrogen, alkyl or benzyl, and Z is hydrogen or alkyl; R3 is hydroxy, methyl or phenyl optionally substituted with a hydroxy group; X is an oxygen atom or a group NH.
Compounds (I) show activity against coccidiosis. They can be prepared as follows:
式 I 的嘧啶并(4,5-c)吡啶以及式 II、III、IV、V 的化合物。
其中 R' 是苄基或任选被羟基取代的烷基;R2 是氢、羟基、甲基、羟甲基、任选被取代的苄基、任选被取代的苯酰基、基团 CH(Y)CO2Z,其中 Y 是氢、烷基或苄基,Z 是氢或烷基;R3 是羟基、甲基或任选被羟基取代的苯基;X 是氧原子或基团 NH。
化合物(I)具有防治球虫病的活性。它们的制备方法如下: