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
Nickel-catalyzed C-F/N-H Alkyne Annulation of Anilines: The Synthesis of Indole Derivatives via C-F Bond Activation
作者:Haruka Kawakami、Naoto Chatani
DOI:10.1246/cl.220074
日期:2022.5.5
The reaction of N-pyrimidinyl aniline derivatives with internal alkynes in the presence of a catalytic amount of a Ni(0) complex results in the alkyne annulation of C-F/N-H, with the formation of indole derivatives. C-F bond activation, a key step in this reaction, is promoted by a pyrimidine directing group. The use of a base, such as NaH is required for the reaction to reach completion.
Nickel-catalyzed alkyne annulation by anilines: versatile indole synthesis by C–H/N–H functionalization
作者:Weifeng Song、Lutz Ackermann
DOI:10.1039/c3cc43915a
日期:——
Versatile nickel catalysts enabled the step-economical synthesis of decorated indoles through alkyne annulations with anilines bearing removable directing groups. The CâH/NâH activation strategy efficiently occurred in the absence of any metal oxidants and with excellent selectivities.
A ruthenium-catalyzed electrochemical dehydrogenative annulation reaction of aniline derivatives and alkynes has been developed for the synthesis of indoles. Electric current is used to recycle the active ruthenium-based catalyst and promote H2 evolution. The electrolysis reaction is operationally convenient as it employs a simple undivided cell, proceeds efficiently in an aqueous solution, and is