The present invention relates to a method of effecting immunosuppression in a patient in need thereof by administering to said patient certain inosine/guanosine derivatives which are inhibitors of purine nucleoside phosphorylases.
wherein
X₁ and X₂ are each independently hydrogen or halogen with the proviso that at least one of X₁ and X₂ is a halogen atom,
A₁ and A₂ are each independently hydrogen, halogen or hydroxy with the provisos that where A₁ is hydroxy, A₂ is hydrogen, and where A₂ is hydroxy, A₁ is hydrogen,
Y₁ is nitrogen, a CH group, a CCl group, a CBr group or a CNH₂ group,
Y₂ is nitrogen or a CH group, and
Z is hydrogen, halogen, or NH₂.
本发明涉及一种对有需要的患者实施免疫抑制的方法,其方法是向所述患者施用某些作为
嘌呤核苷
磷酸酶
抑制剂的
肌苷/
鸟苷衍
生物。
其中
X₁ 和 X₂ 各自独立地为氢或卤素,但 X₁ 和 X₂ 中至少有一个是卤原子、
A₁ 和 A₂ 各自独立地是氢、卤素或羟基,但条件是当 A₁ 是羟基时,A₂ 是氢,当 A₂ 是羟基时,A₁ 是氢、
Y₁ 是氮、CH 基团、CCl 基团、CBr 基团或 CNH₂ 基团、
Y₂ 是氮或 CH 基团,以及
Z 是氢、卤素或 NH₂。