Silver-free activation of ligated gold(I) chlorides: the use of [Me3NB12Cl11]- as a weakly coordinating anion in homogeneous gold catalysis

Michael Wegener; Florian Huber; Christoph Bolli; Carsten Jenne; Stefan F Kirsch

doi:10.1002/chem.201404487

Silver-free activation of ligated gold(I) chlorides: the use of [Me3NB12Cl11]- as a weakly coordinating anion in homogeneous gold catalysis

Chemistry. 2015 Jan 12;21(3):1328-36. doi: 10.1002/chem.201404487. Epub 2014 Nov 13.

Authors

Michael Wegener¹, Florian Huber, Christoph Bolli, Carsten Jenne, Stefan F Kirsch

Affiliation

¹ Organic Chemistry, Bergische Universität Wuppertal, Gaussstrasse 20, 42119 Wuppertal (Germany), Fax: (+49) 202-4392648.

PMID: 25394284
DOI: 10.1002/chem.201404487

Abstract

Phosphane and N-heterocyclic carbene ligated gold(I) chlorides can be effectively activated by Na[Me3NB12Cl11] (1) under silver-free conditions. This activation method with a weakly coordinating closo-dodecaborate anion was shown to be suitable for a large variety of reactions known to be catalyzed by homogeneous gold species, ranging from carbocyclizations to heterocyclizations. Additionally, the capability of 1 in a previously unknown conversion of 5-silyloxy-1,6-allenynes was demonstrated.

Keywords: borates; cyclization; gold; homogeneous catalysis; weakly coordinating anions.