Highly enantioselective palladium-catalyzed formal hydrogenolysis of racemic N-sulfonyloxaziridines has been realized, providing a novel access to sultams with up to 99% ee. Preliminary mechanistic insights revealed that the reaction proceeded through a N-O bond cleavage, dehydration, and the sequential asymmetric hydrogenation.

Planar chiral chromium- and ruthenium-based arene complexes were prepared with high levels of enantioselectivity via a Pd-catalyzed asymmetric hydrogenolysis reaction using a bulky chiral phosphoramidite ligand. Key elements for the efficiency of the process are the use of DABCO as borane-trapping reagent as well as substantial kinetic resolution, which was found to enhance the stereochemical o...

Direct conversion of tetrahydrofurfuryl alcohol, which is one of the biomass-derived chemicals, to 1,5-pentanediol was realized by chemoselective hydrogenolysis catalyzed by Rh/SiO(2) modified with ReO(x) species, and this reaction route gave higher yield than the conventional multi-step method.

Increasing global energy demands have driven research in both alternative renewable energy supplies and synthesis of commodity chemicals from bio-based feedstocks. Many prior studies have used noble metal supported on activated carbon as catalysts for hydrogenation reactions that are often required for such commodity chemical production and often take place in aqueous solution. To gain a deeper...

Abstract Glycerol can be converted to propylene glycol via metal and base catalyzed hydrogenolysis. The nature of the has a profound influence on outcome reaction. We have tested range alkaline (LiOH, NaOH CsOH) earth (Mg(OH) 2 , Ca(OH) Sr(OH) Ba(OH) ) hydroxides in combination with Pt/C. data reveal that exhibit much higher activity improved selectivity. DFT calculations confirm coordination r...

Surface modification using Cu significantly improves the performance of Ru/MWCNT catalysts for selective production 1,2-PD up to (93.4%) from glycerol hydrogenolysis.

The catalytic activity of ruthenium(II) bis(diimine) complexes cis-[Ru(6,6′-Cl2bpy)2(OH2)2](Z)2 (1, Z=CF3SO3; 2, Z= (3,5-(CF3)2C6H3)4B, i.e. BArF) and cis-[Ru(4,4′-Cl2bpy)2(OH2)2](Z)2 (3, Z=CF3SO3; 4, Z=BArF) for the hydrogenation and/or the hydrogenolysis of furfural (FFR) and furfuryl alcohol (FFA) was investigated. Themolecular structures of cis-[Ru(4,4′-Cl2bpy)2(CH3CN)2](CF3SO3)2 (3′) and d...

Platinum nanoparticles in the size range of 1.7-7.1 nm were produced by alcohol reduction methods. A polymer (poly(vinylpyrrolidone), PVP) was used to stabilize the particles by capping them in aqueous solution. The particles were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). TEM investigations demonstrate that the particles have a narrow size distribution...