The bifunctional phosphine-abnormal N-heterocyclic carbene ruthenium(II) complex RuBr(OAc)(PPh3)(P-aNHC) (1) has been synthesized in high yield by reaction of Ru(OAc)(2)(PPh3)(2) with a phosphine imidazolium bromide (P-NHC X HBr) and characterized by X-ray diffraction. This compound shows high catalytic activity for the transfer hydrogenation of ketones to alcohols in 2-propanol. Rate and efficiency of 1 can be enhanced by the addition of ethylenediamine or benzylamine, affording TOFs up to 140 000 h(-1). Reaction of 1 with ethylenediamine leads to the Ru carbene/amine complex [Ru(OAc)(PPh3)(P-aNHC)-(H2NCH2CH2NH2)]Br (2), which displays the same activity of the in situ generated species.     «

The bifunctional phosphine-abnormal N-heterocyclic carbene ruthenium(II) complex RuBr(OAc)(PPh3)(P-aNHC) (1) has been synthesized in high yield by reaction of Ru(OAc)(2)(PPh3)(2) with a phosphine imidazolium bromide (P-NHC X HBr) and characterized by X-ray diffraction. This compound shows high catalytic activity for the transfer hydrogenation of ketones to alcohols in 2-propanol. Rate and efficiency of 1 can be enhanced by the addition of ethylenediamine or benzylamine, affording TOFs up to 140...     »

ISI Document Delivery No.: 201LP Times Cited: 0 Cited Reference Count: 54 Witt, Julia Poethig, Alexander Kuehn, Fritz E. Baratta, Walter Ministero dell'Universita e della Ricerca (MIUR); European Graduate School on Sustainable Energy; DAAD; CRUI (Vigoni Program); TUM Graduate School This work was supported by the Ministero dell'Universita e della Ricerca (MIUR) and the European Graduate School on Sustainable Energy by a PhD grant for J.W. DAAD, CRUI (Vigoni Program), and the TUM Graduate School are acknowledged for financial support of the personnel exchange between the two involved institutions. We thank Johnson-Matthey/Alfa Aesar for a generous loan of ruthenium and Dr. P. Martinuzzi for NMR assistance. 0 Amer chemical soc Washington     «

ISI Document Delivery No.: 201LP Times Cited: 0 Cited Reference Count: 54 Witt, Julia Poethig, Alexander Kuehn, Fritz E. Baratta, Walter Ministero dell'Universita e della Ricerca (MIUR); European Graduate School on Sustainable Energy; DAAD; CRUI (Vigoni Program); TUM Graduate School This work was supported by the Ministero dell'Universita e della Ricerca (MIUR) and the European Graduate School on Sustainable Energy by a PhD grant for J.W. DAAD, CRUI (Vigoni Program), and the TUM Graduate Sch...     »