A series of catalysts based on supportedcoppernanoparticles have been prepared and tested in the amide bond formation from tertiary amines and acid anhydrides, in the presence of tert‐butyl hydroperoxide as an oxidant. Coppernanoparticles on zeolite Y (CuNPs/ZY) was found to be the most efficient catalyst for the synthesis of amides, working in acetonitrile as solvent, under ligand‐ and base‐free
Benzylic C–H addition of aromatic amines to alkenes using a scandium catalyst
作者:Jianhong Su、Yuncong Luo、Xin Xu
DOI:10.1039/d1cc00306b
日期:——
An efficient and selective benzylic C(sp3)–H addition of o-CH3-substituted tertiary aromatic amines to alkenes has been achieved using an anilido-oxazoline ligand supported scandium catalyst, which provides an atom-economic method for the synthesis of a new family of alkylated tertiary anilines. A wide range of amine and alkene substrates are compatible with the catalyst system.
Scandium-Catalyzed Benzylic C(sp<sup>3</sup>)–H Alkenylation of Tertiary Anilines with Alkynes
作者:Xian Xu、Qianlin Sun、Xin Xu
DOI:10.1021/acs.orglett.2c01329
日期:2022.6.10
describes the chemo- and stereoselective benzylic C(sp3)–H alkenylation of tertiary ortho-methyl anilines with internal alkynes using a simple β-diketiminato scandium catalyst. This protocol offers an efficient method for the synthesis of a new family of tertiary ortho-allylanilines in high yields. The resultant alkenylation products facilely underwent further chemical transformation to other valuable anilines
The iron(III)-promoted free radical oxidation of anilines has been further developed. Anilines including those bearing strong electron-withdrawing groups on benzene ring were readily converted into corresponding self-coupling benzidines. With addition of base, the methyl on nitrogen was activated and the free radical oxidations tended to furnish the corresponding self-bridged assembling diaminodiarylmethanes. (C) 2015 Elsevier Ltd. All rights reserved.