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Enantioselective Preparation of a Chiral-at-Metal Cp*Ir(NHC) Complex and Its Application in the Catalytic Diboration of Olefins

2007; American Chemical Society; Volume: 26; Issue: 17 Linguagem: Inglês

10.1021/om7004639

1520-6041

R. Corberan, Vanessa Lillo, J.A. Mata, Elena Fernández, Eduardo Peris,

Asymmetric Hydrogenation and Catalysis

The reaction of (S,S)-1,3-di(methylbenzyl)imidazolium chloride with [Cp*IrCl2]2 in the presence of NaOAc affords the diastereoselective formation of a Cp*Ir(NHC) complex with a chelating ligand coordinated through the carbene and the ortho-position of one of the phenyl groups. The crystal structure of this new enantiomerically pure compound is described. The complex has been used in the catalytic diboration of olefins, providing high efficiencies and chemoselectivities on the organodiboronate products.