Synthesis of<i>N</i>-(2-Pyridyl)indoles via Pd(II)-Catalyzed Oxidative Coupling
作者:Jinlei Chen、Qingyu Pang、Yanbo Sun、Xingwei Li
DOI:10.1021/jo1025546
日期:2011.5.6
Readily available Pd(II) chloride catalysts can catalyze selective and efficientoxidativecoupling between N-aryl-2-aminopyridines and internal alkynes to yield N-(2-pyridyl)indoles. This process involves the ortho C−H activation of N-aryl-2-aminopyridines, and CuCl2 was used as an oxidant. Compared to our previously reported Rh(III)-catalyzed synthesis of this class of product, this method is advantageous
Nanocrystalline magnesium oxide-stabilized palladium(0): an efficient and reusable catalyst for synthesis of N-(2-pyridyl)indoles
作者:Police Vishnuvardhan Reddy、Manne Annapurna、Pottabathula Srinivas、Pravin R. Likhar、Mannepalli Lakshmi Kantam
DOI:10.1039/c5nj00074b
日期:——
A selective and efficient catalytic process has been developed for the oxidative coupling between N-aryl-2-aminopyridines and alkynes using a nanocrystallinemagnesium oxide (NAP–MgO)-supported palladium nanoparticle [NAP–Mg–Pd(0)] catalyst and CuCl2 as an oxidant. The process involves the ortho C–H activation of N-aryl-2-aminopyridines to give N-pyridyl indoles in excellent yields and the true heterogeneity