Different types of six-membered N-heterocyclic gold carbene complexes were prepared by using gold(I) isonitrile complexes as precursors in combination with suitably functionalized amines. The simple procedures provide an easy access to not only unsymmetrically substituted saturated carbene complexes but rarely reported types of carbene complexes such as six-membered N-heterocyclic oxo-carbene complexes, and six-membered partly unsaturated ligands can be obtained following the strategy.
作者:Maria Camila Blanco Jaimes、Constantin R. N. Böhling、Juan Manuel Serrano-Becerra、A. Stephen K. Hashmi
DOI:10.1002/anie.201210351
日期:2013.7.29
One gold is enough: Mononuclear, homogeneous gold catalysts displayed excellent catalytic activity on the order of that previously reported for gold nanoparticle catalysts and surface‐bound gold complexes. In the model synthesis of spiro compounds (see picture) extremely high turnover numbers were achieved with only 0.000001 mol % of a silsesquioxane‐substituted catalyst.