目的 设计合成吡咯并嘧啶类化合物并研究其抑制JAK3激酶的活性。方法 以4-氯-7H-吡咯并[2,3-d]嘧啶为原料，经过取代、氨基脱保护和N-酰化反应合成两类（Ⅰ_a和Ⅰ_b）吡咯并嘧啶类化合物，经体外细胞试验测定其对JAK3激酶的抑制活性。结果 设计并合成了8个新化合物，结构经¹H-NMR和HR-MS确证。初步活性测试结果显示Ⅰ_a-1和Ⅰ_b-3对JAK3的抑制强度与阳性对照药tofacitinib相近。结论 目标化合物对JAK3依赖的DAUDI细胞抑制活性较好，对非JAK3依赖的BT-20细胞抑制作用弱。

Objective To design and synthesize pyrrolopyrimidines and study their JAK3 inhibitory activities. Methods The two kinds of pyrrolopyrimidines (I_a and I_b)were synthesized from 4-chloro-7H-pyrrolo[2,3-d]pyrimidine via substitution reaction, amino deprotection, and N-acetylation reaction. Their JAK3 inhibitory activities were tested by in vitro cell assay. Results Eight novel compounds were synthesized and their structures were confirmed by ¹H-NMR and HR-MS. The in vitro activity experiments showed that compounds I_a-1 and I_b-3 had good inhibition against JAK3, and it was near to control drug tofacitinib. Conclusion Target compounds had good inhibition on JAK3-depended DAUDI cells, and rarely inhibition on non-JAK3-depended BT-20 cells.