The trans heterodiphosphane Ru-based compound of the formula [Ru(OAc)2(CO)2(PnBu3)(PPh3)] proved to be a suitable precatalyst for imine hydrogenation in 2,2,2-trifluoroethanol (TFE) without the addition of an external base. High-pressure (HP) NMR investigations combined with a DFT-study, carried out on a related model precatalyst, were indicating the formation of a cationic Ru-monohydride-2,2,2-trifluoroethanol (TFE) species that catalyzes the imine hydrogenation by a TFE-assisted outer-sphere reaction mechanism.
2,2,2-Trifluoroethanol-assisted imine hydrogenation by a Ru-monohydride / Scodeller, Ivan; Salvini, Antonella; Manca, Gabriele; Ienco, Andrea; Luconi, Lapo; Oberhauser, Werner. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - STAMPA. - 431:(2015), pp. 242-247. [10.1016/j.ica.2015.03.009]
2,2,2-Trifluoroethanol-assisted imine hydrogenation by a Ru-monohydride
SCODELLER, IVAN;SALVINI, ANTONELLA;IENCO, ANDREA;LUCONI, LAPO;
2015
Abstract
The trans heterodiphosphane Ru-based compound of the formula [Ru(OAc)2(CO)2(PnBu3)(PPh3)] proved to be a suitable precatalyst for imine hydrogenation in 2,2,2-trifluoroethanol (TFE) without the addition of an external base. High-pressure (HP) NMR investigations combined with a DFT-study, carried out on a related model precatalyst, were indicating the formation of a cationic Ru-monohydride-2,2,2-trifluoroethanol (TFE) species that catalyzes the imine hydrogenation by a TFE-assisted outer-sphere reaction mechanism.
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