Amination of ethers using chloramine-T hydrate and a copper(i) catalyst
作者:David P. Albone、Stephen Challenger、Andrew M. Derrick、Shaun M. Fillery、Jacob L. Irwin、Christopher M. Parsons、Hiroya Takada、Paul C. Taylor、D. James Wilson
DOI:10.1039/b410883c
日期:——
by ether oxygen atoms is facile with chloramine-T as nitrene source and copper(I) chloride in acetonitrile as catalyst. For cyclicethers the hemiaminal products are generally stable and can be isolated pure. For acyclicethers, the hemiaminal products, as expected, fragment with elimination of alcohol to yield imines. When activation of benzylic positions is remote through a conjugated system, stable
Metal-free C–H Activation over Graphene Oxide toward Direct Syntheses of Structurally Different Amines and Amides in Water
作者:Prashant Shukla、Ambika Asati、Smita R. Bhardiya、Manorama Singh、Vijai K. Rai、Ankita Rai
DOI:10.1021/acs.joc.0c02219
日期:2020.12.4
Unprecedented metal-free synthesis of a variety of amines and amides is reported via amination of C(sp3)–H and C(sp2)–H bonds. The strategy involves graphene-oxide/I2-catalyzed nitrene insertion using PhINTs as a nitrene (NT) source in water at room temperature. A wide range of structurally different substrates, viz., cyclohexane, cyclic ethers, arenes, alkyl aromatic systems, and aldehydes/ketones
据报道,通过胺化C(sp 3)–H和C(sp 2)–H键,空前合成了多种胺和酰胺。该策略涉及在室温下使用PhINTs作为水中的腈(NT)源使用氧化石墨烯/ I 2催化的腈插入。尽管具有较低的收率,但已成功地使用各种结构不同的底物,即环己烷,环醚,芳烃,烷基芳族体系和具有α-苯环的醛/酮,以高收率获得了相应的腈插入产物在少数情况下。所设想的方法在操作简便性,无金属催化,使用水作为溶剂,环境反应条件和催化剂的可重复使用性方面均优于其他方法。
Polynuclear Copper(I) Complexes with Chelating Bis- and Tris-N-Heterocyclic Carbene Ligands: Catalytic Activity in Nitrene and Carbene Transfer Reactions
作者:Cristina Tubaro、Andrea Biffis、Riccardo Gava、Elena Scattolin、Andrea Volpe、Marino Basato、M. Mar Díaz-Requejo、Pedro J. Perez
DOI:10.1002/ejoc.201101480
日期:2012.3
Di- and trinuclear complexes of copper(I) bearing bis- or tris-N-heterocyclic carbene ligands have been prepared and evaluated as catalysts in nitrenetransferreactions from PhI=NTs to unsaturated and saturated substrates (olefin aziridination and C–H bond amidation) and carbenetransferreactions from diazo compounds to olefins. The complexes exhibited moderate-to-high catalytic activity in both
Iron-catalyzed efficient intermolecular amination of C(sp<sup>3</sup>)–H bonds with bromamine-T as nitrene source
作者:Haiyu Wang、Yuxi Li、Zhiming Wang、Jun Lou、Yuling Xiao、Guofu Qiu、Xianming Hu、Hans-Josef Altenbach、Peng Liu
DOI:10.1039/c4ra02240h
日期:——
[Fe(N4Py)(CH3CN)](ClO4)2 can efficiently catalyze intermolecular nitrene insertion of sp3 C–H bonds with bromamine-T as the nitrene source, forming the desired tosylprotected amines with NaBr as the by-product.
Facile Amine Formation by Intermolecular Catalytic Amidation of Carbon−Hydrogen Bonds
作者:Manuel R. Fructos、Swiatoslaw Trofimenko、M. Mar Díaz-Requejo、Pedro J. Pérez
DOI:10.1021/ja0627850
日期:2006.9.1
A simple copper-based catalytic system has been developed for the carbon-hydrogen amidation reaction. The copper-homoscorpionate complex Tp(Br3)Cu(NCMe) catalyzes the transfer of the nitrene unit NTs (Ts = p-toluenesulfonyl) and its subsequent insertion into the sp(3) C-H bonds of alkyl aromatic and cyclic ethers or the sp(2) C-H bonds of benzene using PhI=NTs as the nitrene source, affording the corresponding