Pyrazolopyrimidinone derivatives expressed by the following general formula (IA) or (IB):
where the symbols are as disclosed in the specification, are provided as desired compounds. These compounds selectively inhibiting PDE7, thereby increasing the intracellular cAMP level and inhibiting the activation of T cells. Thus, these compounds are useful for prevention and treatment of various allergic diseases and inflammatory or immunological diseases.
以下一般式(IA)或(IB)所表示的
吡唑并
嘧啶酮衍
生物:
其中符号如说明书所述,作为所需的化合物提供。这些化合物选择性地抑制PD
E7,从而增加细胞内c
AMP水平并抑制T细胞的活化。因此,这些化合物对于预防和治疗各种过敏性疾病和炎症或免疫性疾病非常有用。