Author
J. Rajaram
Bio: J. Rajaram is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Catalysis & Ruthenium. The author has an hindex of 7, co-authored 23 publications receiving 132 citations.
Papers
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TL;DR: In this article, the formation of Ru(V)-oxo species in steady state concentrations from Ru(III) and NMO, and this in turn reacts with the substrate in the rate-determining step.
22 citations
TL;DR: In this paper, a mixed solvent system such as dimethylacetamide-water and dioxane-water is used for the transfer hydrogenation of glucose to a mixture of mixed solvent systems.
16 citations
TL;DR: In this article, RuCl 2 (PPh 3 ) 3 was used as a catalyst for the transfer hydrogenation of fructose to mannitol and glucitol in an inert atmosphere.
14 citations
TL;DR: Cyclohexanone has been used as an acceptor for the dehydrogenation of some natural products in the presence of RuCl2(PPh3)3 as mentioned in this paper.
13 citations
TL;DR: In this paper, a homogeneous hydrogen transfer from 1-phenyl-ethanol (D) to cyclohexanone (A) catalyzed by RuCl 2 (PPh 3 ) 3 (C) in diphenyl ether as solvent at 140 °C was observed.
11 citations
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TL;DR: Past and present developments in hydrogenolysis reactions are highlighted, with special emphasis on the direct utilization of cellulosic feedstocks, to bridge currently available technologies and future biomass-based refinery concepts.
Abstract: In view of the diminishing oil resources and the ongoing climate change, the use of efficient and environmentally benign technologies for the utilization of renewable resources has become indispensible. Therein, hydrogenolysis reactions offer a promising possibility for future biorefinery concepts. These reactions result in the cleavage of C-C and C-O bonds by hydrogen and allow direct access to valuable platform chemicals already integrated in today's value chains. Thus, hydrogenolysis bears the potential to bridge currently available technologies and future biomass-based refinery concepts. This Review highlights past and present developments in this field, with special emphasis on the direct utilization of cellulosic feedstocks.
735 citations
TL;DR: The combination of RuCl2(PPh3)3 and TEMPO affords an efficient catalytic system for the aerobic oxidation of a variety of primary and secondary alcohols, giving the corresponding aldehydes and ketones, in >99% selectivity in all cases.
Abstract: The combination of RuCl2(PPh3)3 and TEMPO affords an efficient catalytic system for the aerobic oxidation of a variety of primary and secondary alcohols, giving the corresponding aldehydes and ketones, in >99% selectivity in all cases. The Ru/TEMPO system displayed a preference for primary vs secondary alcohols. Results from Hammett correlation studies (rho = -0.58) and the primary kinetic isotope effect (kH/kD = 5.1) for the catalytic aerobic benzyl alcohol oxidations are inconsistent with either an oxoruthenium (O=Ru) or an oxoammonium based mechanism. We postulate a hydridometal mechanism, involving a "RuH2(PPh3)3" species as the active catalyst. TEMPO acts as a hydrogen transfer mediator and is either regenerated by oxygen, under catalytic aerobic conditions, or converted to TEMPH under stoichiometric anaerobic conditions.
449 citations
TL;DR: A review of the recent developments in liquid phase chemical conversions of monosaccharides, disaccharide, and polysaccharides can be found in this paper, followed by a process-driven approach where the existing carbohydrate conversion pathways are classified according to the types of chemical processes involved.
271 citations
TL;DR: In this article, the authors provide an overview of the most important recent developments in homogeneous catalysis towards the production and transformation of biomass and biomass related model compounds, including the chemical valorisation of the main components of lignocellulosic biomass.
244 citations
TL;DR: The combination of RuCl2(PPh3)3 and TEMPO as discussed by the authors affords an efficient catalytic system for the aerobic oxidation of a broad range of primary and secondary (aliphatic) alcohols at 100 °C, giving the corresponding aldehydes and ketones, respectively, in >99% selectivity.
120 citations