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Interplay between Hydrido/Dihydrogen and Amine/Amido Ligands in Ruthenium-Catalyzed Transfer Hydrogenation of Ketones

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posted on 15.02.2010, 00:00 authored by Alexandre Picot, Hellen Dyer, Antoine Buchard, Audrey Auffrant, Laure Vendier, Pascal Le Floch, Sylviane Sabo-Etienne
This work describes the synthesis of three key intermediates of Noyori-type catalytic systems that are active precatalysts for the transfer hydrogenation of acetophenone. Isolation of the cationic chloro(dihydrogen) complex [RuCl(H2)(H2NNPP)(PCy3)][BArf4] provides a facile synthetic route to the corresponding cationic and neutral hydrido complexes, and the series highlights the links between hydride/dihydrogen and amine/amido ligands in neutral and cationic species.