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Highly active and selective catalysts of hydrogenation based on palladium bis-acetylacetonate and phenylphosphine

“…Similar dependence was observed with triphenylphosphine [27]. The benzene formation was associated with dephenylation of the organophosphorous ligands, destruction of which was found earlier under reductive conditions [13][14][15][16].…”

“…The specific activity of this catalyst in nitro group reduction exceeds that of nanoscale particles immobilized on the styrene and divinylbenzene copolymer by a factor of 3.5 [23]. But, this catalyst activity is second to earlier studied palladium catalyst with diphenylphosphine [16]. Activity of Pd(acac) 2 + 0.3PH 2 Phbased catalyst can be increased when it is formed in the presence of an activated carbon ("Sibunite", with specific surface 450 m 2 /g).…”

“…Among VIII group of transition metals the palladium-based catalysts for hydrogenation are of special interest [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The modification of palladium by nitrogen-containing bases (quinoline, ethylendiamine, pyridine), as well as alkaloids allows preparing of highly selective catalysts for alkyne and conjugated diene hydrogenation [1][2][3], chemoselective hydrogenation of unsaturated aldehydes and ketones [7,8], enantioselective hydrogenation of ␣,␤-unsaturated acid derivatives, etc.…”

“…[2,3,9,10]. Along with studies of the Pd supported heterogeneous catalysts as well as developing chemistry of Pd nanoclusters [5,6,11,12], determination of mechanistic formation and activity nature of Pd complex catalysts with phosphine ligands is in progress [13][14][15][16][17]. The nanoscale particle formation has been found to be under reductive catalysis conditions.…”

“…The nanoscale particle formation has been found to be under reductive catalysis conditions. The nanoscale particle nature depends on P/Pd ratio, a reductant, and a solvent [13,16]. While the modifying effect of…”