CD73 inhibitor discovered and developed by Arcus Biosciences, currently in clinical trials for the treatment of pancreatic cancer. Herein, we report a concise synthesis of 4,6-dichloro-1H-pyrazolo[3,4-b]pyridine 3, which is the central azaindazole core of AB680. The process consists of four synthetic operations and three isolations, including a PMB-protected pyrazole formation, a telescoped two-step
AB680是Arcus Biosciences发现和开发的一种高效小分子CD73
抑制剂,目前正处于治疗胰腺癌的临床试验阶段。在此,我们报告了 4,6-二
氯-1H-
吡唑并 [3,4- b ]
吡啶3的简明合成,它是 AB680 的中心氮杂
吲唑核心。该过程包括四个合成操作和三个分离,包括 PMB 保护的
吡唑形成、伸缩的两步环化和芳构化序列,以及最后的一锅 PMB 脱保护和
氯化以提供3。该
化学反应成功放大,可提供 >200 g 的3,总收率为 44%,HPLC 纯度为 97.6%。总体而言,路线向3代表了氮杂
吲唑核的有效构建,这是一种具有综合挑战性但普遍存在的结构基序。