Aryl diazonium salts and benzene derivatives bearing two electron-donor substituents: chemical and mechanistic behaviours
作者:Gabriele Micheletti、Carla Boga
DOI:10.1039/d4ra00652f
日期:——
The reaction between benzenederivatives 1–4 and p-substituted benzenediazonium tetrafluoroborates 5a–c provided novel azo-coupling products in high yields under mild conditions. The monitoring of the reaction progress using 1H-NMR provided mechanistic information on both the relative reactivity of the reagents and the possibility to detect novel reaction intermediates.
Synthesis and structural characterization of palladium(II) thiosemicarbazone complex: application to the Buchwald–Hartwig amination reaction
作者:Rupesh Narayana Prabhu、Rengan Ramesh
DOI:10.1016/j.tetlet.2012.12.070
日期:2013.2
A simple route to synthesize mononuclear palladium(II) thiosemicarbazone complex has been described. Elemental analysis, spectral methods and single crystal X-ray diffraction analysis were used to confirm the composition of the complex. The new complex acts as an active homogeneous catalyst for the Buchwald-Hartwig amination reaction of a wide range of aryl and heteroaryl halides (bromides and chlorides), including activating, neutral and deactivating substrates, with various secondary amines under optimized conditions. (C) 2012 Elsevier Ltd. All rights reserved.
Nickel-catalysed synthesis of 3-chloroanilines and chloro aminopyridines via cross-coupling reactions of aryl and heteroaryl dichlorides with amines
作者:Christophe Desmarets、Raphaël Schneider、Yves Fort
DOI:10.1016/s0040-4039(00)01931-6
日期:2001.1
Selective monoamination of aryl and heteroaryl dichlorides has been carried out using a catalyst combination of Ni(0) associated to 2,2'-bipyridine. The synthesis of novel 3-chloroanilines and chloro aminopyridines in good to excellent yields is allowed using an excess of amine, 10 or 20 mol% catalyst and short reaction times. (C) 2000 Elsevier Science Ltd. All rights reserved.
gem-cyclodialkylation A facile synthetic route to N-substituted heterocycles
作者:Duane C. Hargis、Ronald L. Shubkin
DOI:10.1016/s0040-4039(00)89006-1
日期:——
Unsaturated Amines. XIII. The Sites of Alkylation and Protonation in Certain Enaminoketones. Substituted Trimethinium Compounds from O-Alkylated Enaminoketones<sup>1</sup>