A mild and selective C6 arylation strategy for pyrrolo[2,3-d]pyrimidine derivatives with arylboronic acids at room temperature is described. This unified protocol has been achieved by the synergistic combination of Pd(II)/TEMPO catalysis and CF3CO2H promotion under silver-, base-, and additive-free conditions. The broad substrate scope, good functional group tolerance, excellent regioselectivity, and
描述了在室温下吡咯并 [2,3- d ] 嘧啶衍生物与芳基硼酸的温和选择性 C6 芳基化策略。该统一协议是通过 Pd(II)/TEMPO 催化和 CF 3 CO 2 H 促进在无银、无碱和无添加剂的条件下的协同组合实现的。广泛的底物范围、良好的官能团耐受性、出色的区域选择性以及空气和水分耐受性使该过程对于靶向小分子药物的有效合成和修饰具有吸引力。
Ligand-Enabled C6-Selective C–H Arylation of Pyrrolo[2,3-d] Pyrimidine Derivatives with Pd Catalysts: An Approach to the Synthesis of EGFR Inhibitor AEE-788
Herein, we report the Pd(II)-catalyzeddirect C–H arylation of pyrrolo[2,3-d]pyrimidine derivatives with aryl iodides, which is enabled by bidentate pyridine–pyridine ligands. A range of aryl iodides proved to be suitable coupling partners affording the desired products in good yields with high levels of C6 selectivity. This protocol features good tolerance of reactive functional groups, mild reaction
在此,我们报道了 Pd(II) 催化的吡咯并[2,3- d ]嘧啶衍生物与芳基碘化物的直接 C-H 芳基化,这是通过二齿吡啶-吡啶配体实现的。一系列芳基碘化物被证明是合适的偶联伙伴,能够以良好的产率和高水平的 C6 选择性提供所需的产物。该方案具有对反应性官能团良好的耐受性、温和的反应条件和简单的反应体系,为制备生物活性化合物中常见的一类重要的6-芳基吡咯并[2,3- d ]嘧啶提供了一条快捷的途径,并提供了逐步经济地获得第二代 EGFR 抑制剂 AEE-788。