Iminophosphanes: Synthesis, Rhodium Complexes, and Ruthenium(II)-Catalyzed Hydration of Nitriles
作者:Mark K. Rong、Koen van Duin、Tom van Dijk、Jeroen J. M. de Pater、Berth-Jan Deelman、Martin Nieger、A. W. Ehlers、J. Chris Slootweg、Koop Lammertsma
DOI:10.1021/acs.organomet.7b00057
日期:2017.3.13
Highly stable iminophosphanes, obtained from alkylating nitriles and reaction of the resulting nitrilium ions with secondary phosphanes, were explored as tunable P-monodentate and 1,3-P,N bidentate ligands in rhodium complexes. X-ray crystal structures are reported for both k1 and k2 complexes with the counterion in one of them being an unusual anionic coordination polymer of silver triflate. The iminophosphane-based ruthenium(II)-catalyzed hydration of benzonitrile in 1,2-dimethoxyethane (180 degrees C, 3 h) and water (100 degrees C, 24 h) and under solvent free conditions (180 degrees C, 3 h) results in all cases in the selective formation of benzamide with yields of up to 96%, thereby outperforming by far the reactions in which the common 2-pyridyldiphenylphosphane is used as the 1,3-P,N ligand.