The solvent determines the product in the hydrogenation of aromatic ketones using unligated RhCl<sub>3</sub> as catalyst precursor
作者:Soumyadeep Chakrabortty、Nils Rockstroh、Stephan Bartling、Henrik Lund、Bernd H. Müller、Paul C. J. Kamer、Johannes G. de Vries
DOI:10.1039/d1cy01504d
日期:——
Alkyl cyclohexanes were synthesized in high selectivity via a combined hydrogenation/hydrodeoxygenation of aromaticketones using ligand-free RhCl3 as pre-catalyst in trifluoroethanol as solvent. The true catalyst consists of rhodiumnanoparticles (Rh NPs), generated in situ during the reaction. A range of conjugated as well as non-conjugated aromaticketones were directly hydrodeoxygenated to the corresponding
Bimetallic Nanoparticles in Supported Ionic Liquid Phases as Multifunctional Catalysts for the Selective Hydrodeoxygenation of Aromatic Substrates
作者:Lisa Offner-Marko、Alexis Bordet、Gilles Moos、Simon Tricard、Simon Rengshausen、Bruno Chaudret、Kylie L. Luska、Walter Leitner
DOI:10.1002/anie.201806638
日期:2018.9.24
Bimetallic iron–ruthenium nanoparticles embedded in an acidic supported ionic liquidphase (FeRu@SILP+IL‐SO3H) act as multifunctional catalysts for the selective hydrodeoxygenation of carbonyl groups in aromatic substrates. The catalyst material is assembled systematically from molecular components to combine the acid and metal sites that allow hydrogenolysis of the C=O bonds without hydrogenation
sed supported ionicliquid phase (Rh@SILP(Ph3‐P‐NTf2)) enabled the selective hydrogenation and hydrodeoxygenation of aromatic ketones. The flexible molecular approach used to assemble the individual catalyst components (SiO2, ionicliquid, nanoparticles) led to outstanding catalytic properties. In particular, intimate contact between the nanoparticles and the phosphonium ionicliquid is required for
THE SYNTHESIS OF SOME STEREOISOMERIC DERIVATIVES OF DECAHYDRONAPHTHALENE
作者:A. Zlatkis、E. A. Smith
DOI:10.1139/v51-020
日期:1951.2.1
reaction between these chlorodecalins and ethylmagnesium bromide has been studied and two racemates of trans 2-ethyl decalin have been isolated. Some progress has been made in the preparation of the 9-chlorodecalins. A new method for converting cis decalin to trans decalin rapidly in high yield using tertiary butyl chloride and anhydrousaluminum chloride is indicated.
Cyclohexane and methylcyclopentane dimerize into dimethyldecalins on treatment with superelectrophilic systems containing polyhalomethanes (CBr4, CCl4, CHCl3) and aluminum halides (AlBr3, AlCl3). At 20 degreesC, the yields Of C12H22 hydrocarbons reach 140 mol.% based on the superelectrophile. Under the action of CBr4. 2AlBr(3) at 20 degreesC in CH2Br2 or without a solvent, n-pentane is converted predominantly into lower alkanes (mainly, isopentane). In addition, higher branched C-8-C-12 alkanes, small amounts of alkylated cyclohexanes, cycloalkenes, dienes, and alkylbenzenes are formed in a total yield of 20-23% (w/w) based on pentane.