A compound of the formula
1
wherein R
1
, R
2
and R
3
are as defined above, which are inhibitors of the enzyme protein tyrosine kinases such as Janus Kinase 3 and as such are useful therapy as immunosuppressive agents for organ transplants, lupus, multiple sclerosis, rheumatoid arthritis, psoriasis, Type I diabetes and complications from diabetes, cancer, asthma, atopic dermatitis, autoimmune thyroid disorders, ulcerative colitis, Crohn's disease, Alzheimer's disease, Leukemia and other autoimmune diseases.
该化合物的
化学式为1,其中R1、R2和R3如上所定义,是
蛋白酪氨酸激酶的
抑制剂,例如Janus Kinase 3,因此可作为
免疫抑制剂用于器官移植、狼疮、多发性硬化症、类风湿性关节炎、
银屑病、1型糖尿病及糖尿病并发症、癌症、哮喘、特应性皮炎、自身免疫性甲状腺疾病、溃疡性结肠炎、克罗恩病、阿尔茨海默病、白血病和其他自身免疫性疾病的治疗。