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
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
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.