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First Cp*-Functionalized N-Heterocyclic Carbene and Its Coordination to Iridium. Study of the Catalytic Properties

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posted on 24.03.2008, 00:00 by André Pontes da Costa, Mónica Viciano, Mercedes Sanaú, Sonia Merino, Juan Tejeda, Eduardo Peris, Beatriz Royo
A new pentamethylcyclopentadienyl-functionalized N-heterocyclic carbene ligand (Cp*-NHCMe) has been prepared and coordinated to iridium upon reaction with [Ir(μ-Cl)(cod)]2. The chiral Ir complex is obtained as a racemic mixture of the two possible enantiomers, and its crystal structure is described. The new compound shows high catalytic activity toward transfer hydrogenation, β-alkylation of secondary alcohols with primary alcohols, and amination of primary alcohols.