American Chemical Society
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Bifunctional Triflylamide-Tethered Cp′Rh and Cp′Ir Complexes: A New Entry for Asymmetric Hydrogenation Catalysts

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journal contribution
posted on 2010-06-14, 00:00 authored by Masato Ito, Yoshinori Endo, Noriko Tejima, Takao Ikariya
A series of triflylamide-tethered Cp′Rh and Cp′Ir complexes, [η51-(CH3)4C5(CH2)nNTf]M (M = Rh, Ir, n = 2−4), have been newly prepared and their three-legged piano-stool structure has been characterized. The tethered complexes having the (R,R)-MsDPEN ligand have been found to promote asymmetric hydrogenation of acetophenone, which indicates that the introduction of a suitable triflylamide tether unit changes their catalytic function from transfer hydrogenation to hydrogenation.