A combined mechanistic and computational study of the gold(I)-catalyzed formation of substituted indenes

Org Biomol Chem. 2011 Jan 7;9(1):101-4. doi: 10.1039/c0ob00758g. Epub 2010 Oct 20.

Abstract

Substituted indenes can be prepared after a sequence [1,3] O-acyl shift-hydroarylation-[1,3] O-acyl shift. Each step is catalyzed by a cationic NHC-Gold(I) species generated in situ after reaction between [(IPr)AuOH] and HBF(4)·OEt(2). This interesting silver-free way is fully supported by a computational study justifying the formation of each intermediate.