Heterogeneous Copper(I)-Catalyzed Cascade Addition–Oxidative Cyclization of Nitriles with 2-Aminopyridines or Amidines: Efficient and Practical Synthesis of 1,2,4-Triazoles
作者:Jianhui Xia、Xue Huang、Mingzhong Cai
DOI:10.1055/s-0037-1611712
日期:2019.5
addition-oxidative cyclization of nitriles with 2-aminopyridines or amidines was achieved in 1,2-dichlorobenzene or DMSO at 120–130 °C by using a 1,10-phenanthroline-functionalized MCM-41-supported copper(I) complex [Phen-MCM-41-CuBr] as the catalyst and air as the oxidant. The approach was used to generate a wide variety of 1,2,4-triazole derivatives in mostly high yields. This heterogeneous copper(I) catalyst
抽象的 通过使用1,10-菲咯啉官能化的MCM-41负载的铜(I)在120-130°C下于1,2-二氯苯或DMSO中实现了2-氨基吡啶或am与腈的异质级联加成-氧化环化。络合物[Phen-MCM-41-CuBr]作为催化剂,空气作为氧化剂。该方法用于以大多数高收率产生各种各样的1,2,4-三唑衍生物。这种多相铜(I)催化剂可通过两步程序轻松地从市售或容易获得的廉价试剂中制备,并且比CuBr / 1,10-Phen体系显示出更高的催化活性。Phen-MCM-41-CuBr还易于回收,可回收利用多达八次,且活性几乎一致。 通过使用1,10-菲咯啉官能化的MCM-41负载的铜(I)在120-130°C下于1,2-二氯苯或DMSO中实现了2-氨基吡啶或am与腈的异质级联加成-氧化环化。络合物[Phen-MCM-41-CuBr]作为催化剂,空气作为氧化剂。该方法用于以大多数高收率产生各种各样的1,2