organic processes by water, we studied the double bond isomerization of hydrophobic allylarenes, in aqueousmicroemulsions. The catalyst for these reactions was the rhodium-trichloride-Aliquat® 336 ion pair encaged within hydrophobic silica sol–gel. During the entrapment of the rhodium compound, it was converted into supported catalytically active Rh(0) nanoparticles characterized by TEM and XPS studies.
Manganese-Catalyzed Cross-Coupling Reaction between Aryl Grignard Reagents and Alkenyl Halides
作者:Gérard Cahiez、Olivier Gager、Fabien Lecomte
DOI:10.1021/ol802273e
日期:2008.11.20
Aryl Grignard reagents react stereospecifically with alkenylhalides in the presence of manganese chloride (10%) to afford good yields of cross-coupling products.
芳基格氏试剂在氯化锰(10%)存在下与烯基卤化物立体定向反应,以提供良好的交叉偶联产物收率。
Iron-catalyzed olefin hydrogenation at 1 bar H<sub>2</sub> with a FeCl<sub>3</sub>–LiAlH<sub>4</sub> catalyst
作者:Tim N. Gieshoff、Matteo Villa、Alice Welther、Markus Plois、Uttam Chakraborty、Robert Wolf、Axel Jacobi von Wangelin
DOI:10.1039/c4gc02368d
日期:——
The scope and mechanism of a practical protocol for the iron-catalyzed hydrogenation of alkenes and alkynes at 1 bar H2 pressure were studied.
研究了在1巴氢气压力下,铁催化的烯烃和炔烃氢化的实际协议的范围和机制。
Nitrogen-Doped Carbon-Encapsulated Nickel/Cobalt Nanoparticle Catalysts for Olefin Migration in Allylarenes
homogeneous catalysts. In contrast, very limited progress has been made with the use of cheap, Earth‐abundant base metals as heterogeneous catalysts for these transformations—in spite of the obvious economic and environmental advantages. Herein, we report on the use of an easily prepared heterogeneous catalyst material for the migration of olefins, in particular, for allylarenes. The catalyst material
derivatives. These results clearly indicated that stereochemicaldriftoccurred at those temperatures, even in reactions using nonstabilized phosphonium ylides. The stereochemicaldrift in the phosphastibatriptycene system occurred at a lower temperature than in the case of the triphenyl derivative, thus explaining the (E)-selective Wittigreactions between the benzaldehyde derivatives and the nonstabilized