Trial for anti-Markovnikov Hydration of 1-Decene Using Platinum Complexes Bearing a PBP Pincer Ligand, Inducing Alkene Isomerization and Decomposition of PBP Ligand
作者:Hayato Ogawa、Makoto Yamashita
DOI:10.1246/cl.131208
日期:2014.5.5
Mixing of [(PBP)PtCl] complex with 1-decene and H2O afforded isomerized alkenes. Deuterium-labeling experiment indicated the catalytically active hydride species for alkene isomerization formed from water and [(PBP)Pt] complex. Reaction of [(PBP)PtNTf2] with H2O gave a platinum hydride complex having PNNP ligand with a loss of boron atom, but the resulting complex showed low catalytic activity. Two types of cationic platinum hydride complexes were suggested as active species for alkene isomerization.
Catalysts with a sheltered upbringing: Novel core–shell nanocomposite catalysts consisting of active metal nanoparticles encapsulated by macroligands have been prepared. They have Pd nanoparticles (PdNPs) as an active core and shell ligands having sulfoxide moieties coordinated to the PdNPs. The shell protects the catalyst from coordination by alkenes and allows the lead‐free selective semihydrogenation
The impact of the presence and amount of [BMIM][NTf2] ionic liquid during the preparation of bulk NiMoS catalysts was investigated. It was clearly shown that these factors have a strong influence on both the morphology and specific surface area of the obtained NiMoS samples. Most interestingly the catalytic activity for the transformation of decanoic acid increased up to three times when IL was present
Acid-catalysed carboxymethylation, methylation and dehydration of alcohols and phenols with dimethyl carbonate under mild conditions
作者:Saimeng Jin、Andrew J. Hunt、James H. Clark、Con Robert McElroy
DOI:10.1039/c6gc01826b
日期:——
Dimethyl carbonate (DMC) chemistry has been extended to include acid-catalysed reactions of different aliphatic alcohols and phenols. For the first time, p-toluenesulfonic acid (PTSA), H2SO4, AlCl3 and FeCl3 have been...
The metathesis of α-olefins over supported Re-catalysts in supercritical CO<sub>2</sub>
作者:Maurizio Selva、Alvise Perosa、Massimo Fabris、Patrizia Canton
DOI:10.1039/b815121k
日期:——
At 35 °C, in the presence of supercriticalcarbondioxide (80–150 bar) as a solvent, α-olefins (RCHCH2, R = C4–C6) undergo highly selective self-metathesis catalyzed by supported Re-oxide (7%). To the best of our knowledge, this is the first procedure for the metathesis of alkenes, in which heterogeneous catalysts are combined with the use of dense CO2. The intrinsic eco-compatibility and the unique