Some insights into the gold-catalysed A 3 -coupling reaction
作者:Gregory A. Price、Alan K. Brisdon、Simon Randall、Edward Lewis、Daniel M. Whittaker、Robin G. Pritchard、Chris A. Muryn、Kevin R. Flower、Peter Quayle
DOI:10.1016/j.jorganchem.2017.06.019
日期:2017.10
application to A3-coupling reactions is presented. Gold(III) complexes were found to be particularly effective catalysts for the coupling in a range of solvents, however no asymmetric induction was obtained when using chiral gold complexes and the rate of product formation was found to be similar even when using different ligand systems. In-situ NMR analysis of these reactions indicates that decomposition
Solvent effects in gold-catalysed A3-coupling reactions
作者:Gregory A. Price、Alan K. Brisdon、Kevin R. Flower、Robin G. Pritchard、Peter Quayle
DOI:10.1016/j.tetlet.2013.10.141
日期:2014.1
Gold-catalysed A(3)-reactions proceed efficiently when conducted in 2,2,2-trifluoroethanol as solvent. The rates of these reactions are accelerated considerably when conducted in a microwave reactor. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.
A<sup>3</sup>
-Coupling Reaction and [Ag(IPr)<sub>2</sub>
]PF<sub>6</sub>
: A Successful Couple
cationic [Ag(IPr)2]PF6 [IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolylidene] complex proved to be a versatile and highly efficient catalyst for the production of propargylamines by using the A3-coupling reaction. The reaction conditions were equally applicable to aliphatic and aromatic aldehydes and alkynes, including highly hindered aromatic aldehydes. Progargylamines were prepared in short reaction times