Dramatic Rate Acceleration by a Diphenyl-2-pyridylphosphine Ligand in the Hydration of Nitriles Catalyzed by Ru(acac)₂ Complexes

Abstract

New ruthenium(II) complexes having acac (=acetylacetonato) and diphenyl-2-pyridylphosphine as ligands proved to be excellent catalysts for hydration of nitriles to amides under neutral conditions. Among the ruthenium complexes examined, cis-Ru(acac)2(PPh2py)2 exhibited the highest activity, with a turnover frequency of up to 20 900 (mol of amide)/((mol of catalyst) h).

STRUCTURAL AND PHOTOPHYSICAL PROPERTIES OF A MONONUCLEAR Re(I) COMPLEX:[P,N-{(C6H5)2(C5H5N)P}Re(CO)3Br]

“…Structures of monometallic complexes where the ligand exhibits a bidentate P,N (chelating) mode have been described for Ru, [9][10][11][12][13][14] 26 This latter species have been described to have an absorption band in the visible region at 479 nm which have been assigned as MLCT band and assigned with the help of TDDFT to a…”

Structures, Mechanisms, and Results in Bifunctional Catalysis and Related Species Involving Proton Transfer

“…In addition to the work described above, since 2005, several notable reports of pyridylphosphine-enhanced catalysis from other labs have appeared, including in situ alkyne hydration catalysts [27], applications of antiMarkovnikov alkyne hydration to selective organic synthesis [28][29][30], and enhanced nitrile hydration [31].…”

Synthesis and structures of two ruthenium dibenzoylmethane triphenylphosphine mixed ligand complexes

“…Some of them reveal good catalytic effects [7,8] and remarkable biological activities [9,10]. However, in spite of extensive work, only a few fully structurally characterized ruthenium b-diketonate complexes containing phosphines have been published, so far [11][12][13][14][15].…”