Synthesis, characterization, catalytic and biological application of half-sandwich ruthenium complexes bearing hemilabile (κ2-<i>C</i>,<i>S</i>)-thioether-functionalised NHC ligands
作者:Weiguang Chen、Julien Egly、Amalia I. Poblador-Bahamonde、Aline Maisse-Francois、Stéphane Bellemin-Laponnaz、Thierry Achard
DOI:10.1039/c9dt04825a
日期:——
suggesting that the only species observed by the 1H-NMR correspond to an average resonance position of a fluxional mixtures of isomers. All these complexes were found to catalyse the oxydant-free double dehydrogenation of primary amine into nitrile. Ru complexbearing NHC-functionalised S-tBu group was further investigated in a wide range of amines and was found more selective for alkyl amine substrates than
The dehydration reaction of primary amides is one of the most fundamental methods for the synthesis of nitriles, and the development of environmentallybenign catalytic reaction processes is needed. We surveyed a variety of metal catalysts and found that perrhenic acid was extremely effective for the dehydration of not only primary amides but also aldoximes. Typically, 1 mol % of perrhenic acid gave
A ligand controlled catalytic system for the aerobicoxidation of 1[degree] amines to nitriles and imines has been developed where the varying [small pi]-acidic feature of BIAN versus phen in the frameworks of ruthenium catalysts facilitates switchable selectivity.
A Facile and Efficient One-Pot Synthesis of Nitriles from Aldehydes Using Hypervalent Iodine(III) Reagents in Aqueous Ammonium Acetate
作者:Yunyang Wei、Chenjie Zhu、Lei Ji
DOI:10.1055/s-0030-1258162
日期:2010.9
procedure for the direct oxidation of aldehydes to the corresponding nitriles using either the hypervalentiodine(III) reagent PhI(OAc)2 or a polymer-supported hypervalentiodine(III) reagent poly4-[bis(acetoxy)iodo]}styrene as oxidant is reported. The oxidation proceeded in water at 70 ˚C in the presence of sodium dodecylsulfate using ammonium acetate as nitrogen source. The reaction was complete in four
Simple Copper Catalysts for the Aerobic Oxidation of Amines: Selectivity Control by the Counterion
作者:Boran Xu、Elizabeth M. Hartigan、Giancarlo Feula、Zheng Huang、Jean-Philip Lumb、Bruce A. Arndtsen
DOI:10.1002/anie.201609255
日期:2016.12.19
simple copper‐salt catalysts in the selective aerobic oxidation of amines to nitriles or imines. These catalysts are marked by their exceptional efficiency, operate at ambient temperature and pressure, and allow the oxidation of amines without expensive ligands or additives. This study highlights the significant role counterions can play in controlling selectivity in catalytic aerobic oxidations.