A novel strategy for the construction of the phthalazin-1(2H)-one scaffold has been developed by means of a copper-mediated cascade C–H/C–H coupling and intramolecular annulations and a subsequent facile hydrazinolysis. This C–H activation transformation proceeds smoothly with wide generality, good functional tolerance and high stereo- and regioselectivity under mild conditions. Through the removal of the directing group, the resulting moiety could easily be transformed into the phthalazin-1(2H)-one scaffold, which is known to be a privileged moiety and a bioactive nucleus in pharmaceuticals.
通过铜介导的级联C-H/C-H偶联和分子内环化以及随后的简便的叠氮解离,已经开发出了一种构建邻苯二氮杂环己酮骨架的新策略。这种C-H活化转化在温和条件下顺利进行,具有广泛的通用性、良好的官能团容忍性和高立体和区域选择性。通过去除引导基团,得到的基团可以轻松转化为邻苯二氮杂环己酮骨架,这在药物中被认为是一种特权基团和生物活性核。