Axially Chiral Bidentate N-Heterocyclic Carbene Ligands Derived from BINAM: Rhodium and Iridium Complexes in Asymmetric Ketone Hydrosilylation
Organometallics2005Vol. 24(18), pp. 4432–4436
Citations Over TimeTop 10% of 2005 papers
Abstract
New bis(N-heterocyclic carbene) and N-heterocyclic carbene−naphthoxy ligands are synthesized in two steps from (S)-1,1‘-diamino-2,2‘-binaphthyl. Rhodium and iridium complexes of the carbene−naphthoxy ligands were applied to the catalytic asymmetric hydrosilylation of acetophenone with diphenylsilane. Low enantioselectivities (12−13% ee) were observed for the rhodium-catalyzed reaction, but moderate enantioselectivities (50−60% ee) were seen for iridium.
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