Nickel-catalyzed Chan–Lam cross-coupling: chemoselective N-arylation of 2-aminobenzimidazoles
作者:K. Anil Kumar、Prakash Kannaboina、D. Nageswar Rao、Parthasarathi Das
DOI:10.1039/c6ob01307d
日期:——
A complementary set of Ni- and Cu-based catalyst systems for the selective N-arylation of 2-aminobenzimidazoles have been developed. Selective N-arylation of the primary amine (C-NH2) group was achieved by Ni-catalyzed, boronic acid promoted cross-coupling reactions in air, whereas, selective N-arylation of the azole nitrogen was achieved with Cu-catalysis and aryl halides. These protocols are general
已经开发出用于2-氨基苯并咪唑的选择性N-芳基化的一组互补的Ni和Cu基催化剂体系。选择性Ñ伯胺(C-NH的-arylation 2)基团,通过实现镍催化,硼酸促进交叉耦合在空气中反应,而选择性Ñ唑氮的-arylation用铜催化和芳实现卤化物。这些规程是通用的,可快速访问2-氨基苯并咪唑的N-芳基化异构体的阵列。