Herein, we disclose an efficient Pd(II)-catalyzed site selective C8 alkenylation of imidazo[1,2-a]pyridines with electronically biased olefinic substrates. Notably, besides the presence of four C–H sites available, selective mono-alkenylation was achieved by N-chelation overriding O-chelation. The versatility and scalability of the catalysis enabled the selective late-stage functionalization of a marketed
在此,我们公开了一种有效的 Pd( II ) 催化位点选择性 C8 烯基化
咪唑并[1,2- a ]
吡啶与电子偏压烯烃底物。值得注意的是,除了存在四个可用的 C-H 位点外,选择性单烯基化是通过 N-螯合压倒 O-螯合来实现的。催化的多功能性和可扩展性使已上市药物唑胺的选择性后期功能化成为可能。各种取代的杂芳基烯烃可以以中等至良好的产率和高 C8 区域选择性提供。