Imidazole compounds having adenosine deaminase inhibitory activity represented by formula (I) wherein R1 is hydrogen, hydroxy, protected hydroxy, or aryl optionally substituted with suitable substituent (s); R2 is hydrogen or lower alkyl; R3 is hydroxy or protected hydroxy; R4 is cyano, (hydroxy)iminoamino(lower)alkyl, carboxy, protected carboxy, heterocyclic group optionally substituted with amino, or carbamoyl optionally substituted with suitable substituent(s); and -A- is -Q- or -O-Q-, wherein Q is single bond or lower alkylene, provided that when R2 is lower alkyl, then R1 is hydroxy, protected hydroxy, or aryl optionally substituted with suitable substituent(s), its prodrug, or their salt. The compounds are useful for treating and/or preventing diseases for which adenosine is effective.
具有
腺苷脱氨酶抑制活性的
咪唑化合物,其
化学式表示为(I),其中R1为氢、羟基、保护羟基或芳基,可选择性地取代适当的取代基;R2为氢或较低的烷基;R3为羟基或保护羟基;R4为
氰基、(羟基)亚
氨基(较低)烷基、羧基、保护羧基、杂环基,可选择性地取代
氨基,或者取代适当基团的
氨基甲酰基;-A-为-Q-或-O-Q-,其中Q为单键或较低的烷基,但当R2为较低的烷基时,R1为羟基、保护羟基或芳基,可选择性地取代适当的取代基,其前药或其盐。这些化合物可用于治疗和/或预防
腺苷对其有效的疾病。