Showing papers on "Transfer hydrogenation published in 1989"
TL;DR: In this paper, three alkyl phenanthrolines containing a norpinanyl substituent as the common chiral target were synthesized and tested as ligands in the rhodium-catalyzed asymmetric transfer hydrogenation of acetophenone.
41 citations
TL;DR: In this paper, a mechanism for the transfer hydrogenation of ketones to secondary alcohols catalysed by HFe3(CO)11−1 (1) in the presence of Phase Transfer Catalysts (PTC) has been proposed using labelled hydrogen, NMR and IR techniques.
36 citations
TL;DR: In this paper, a versatile catalyst for selective transfer hydrogenation of α,β-unsaturated ketones to saturated ketones, dienes to monoenes, acetylenes to olefins, and Schiff bases to amines is presented.
12 citations
TL;DR: In this article, the following types of reactions catalyzed by heteropolyacids are described: (i) acetalization and ketalization of aldehydes and ketones, (ii) transfer hydrogenation of nitro compounds to amino compounds using sodium borohydride as the hydrogen source, and (iii) selective reduction of Nitro compounds and ketone in the presence of an aldehyde.
11 citations
TL;DR: Trinuclear and tetranuclear ruthenium clusters act as active intermediates in the transfer hydrogenation reactions of CX4 (X = Cl, Br); a representative trinuclear species Ru3(CO)7Cl2(OC6H11)2 has been characterised as discussed by the authors.
6 citations
TL;DR: A simple column reactor containing a small amount of palladium catalyst, in the form of Palladium black, and formic acid as a hydrogen donor can be used to hydrogenate several types of olefins.
Abstract: A simple column reactor containing a small amount of palladium catalyst, in the form of palladium black, and formic acid as a hydrogen donorcan be used to hydrogenate several types of olefins.
1 citations
DOI•
01 Jun 1989
TL;DR: The historical background of and the incentive for using ruthenium carbonyl clusters as homogeneous catalysts are outlined in this paper, where the uncertainties arising from declusterification and metal colloid formation are discussed.
Abstract: The historical background of and the incentive for using ruthenium carbonyl clusters as homogeneous catalysts are outlined. Keeping in view the possible solutions the uncertainties arising from declusterification and metal colloid formation are discussed. All ruthenium cluster-catalysed reactions are broadly classified as reactions with or without carbon monoxide as one of the reactants and the basic differences between such reactions are highlighted. Some of the factors of special relevance to cluster-catalysed reaction systems are mentioned. The reactions involving carbon monoxide are then discussed. These include water-gas-shift reaction, carbon monoxide hydrogenation, hydroformylation, reductive carbonylation of nitrobenzene and other carbonylation reactions. Hydrogenation, transfer hydrogenation, isomerisation and a few other reactions are then discussed. For all these reactions, special emphasis is laid on well-characterised cluster complexes that have been proposed as catalytic intermediates. Finally an attempt has been made to identify the path that future research in cluster catalysis is likely to follow.
1 citations
TL;DR: In this paper, a versatile catalyst for selective transfer hydrogenation of α,β-unsaturated ketones to saturated ketones, dienes to monoenes, acetylenes to olefins, and Schiff bases to amines is presented.
Abstract: Rhpy 3 Cl 3 (py = pyridine) has been found to be a versatile catalyst in selective transfer hydrogenation of α,β-unsaturated ketones to saturated ketones, dienes to monoenes, acetylenes to olefins, and Schiff bases to amines. With catalytic systems formed “in situ” from RhCl 3 · x H 2 O and chiral monodentate amines such as R , S (−)-ephedrine, enantioselective reduction of ketones takes place but the optical yields are rather low.