2146-41-0Relevant articles and documents
Selective Catalytic Hydrogenation of Alicyclic Dienes with Hydrogen in a Liquid Phase
Bermeshev,Antonova,Shangareev,Danilova,Pozharskaya
, p. 869 - 875 (2018/10/15)
Abstract: The hydrogenation behavior of a number of alicyclic dienes (5-vinyl-2-norbornene (5-vinyl-bicyclo[2.2.1]heptene-2), dicyclopentadiene (tricyclo[5.2.1.02,6]decadiene-3,8), and cis,cis-1,5-cyclooctadiene) to the corresponding cycloalkenes in the presence of a finely divided palladium catalyst suspended in the liquid phase has been studied. The reactivities of the double bonds of these dienes have been compared. The conversion of 5-vinyl-2-norbornene and selectivity of its hydrogenation to 2-vinylnorbornane depending on the reaction conditions have been evaluated. Conditions for the selective production of desired 2-vinylnorbornane are proposed for the further implementation of this process in practice.
Oxygen-Deficient Tungsten Oxide as Versatile and Efficient Hydrogenation Catalyst
Song, Jiajia,Huang, Zhen-Feng,Pan, Lun,Zou, Ji-Jun,Zhang, Xiangwen,Wang, Li
, p. 6594 - 6599 (2015/11/18)
Heterogeneous hydrogenation is one of the most important industrial operations, and reduced metals (mostly noble metals and a few inexpensive metals) generally serve as the catalyst to activate molecular H2. Herein we report oxygen-deficient tungsten oxide, such as WO2.72, is a versatile and efficient catalyst for the hydrogenation of linear olefins, cyclic olefins, and aryl nitro groups, with obvious advantages compared with non-noble metal nickel catalyst from the aspect of activity and selectivity. Density functional theory calculations prove the oxygen-deficient surface activates H2 very easily in both kinetics and thermodynamics. Testing on several oxygen-deficient tungsten oxides shows a linear dependence between the hydrogenation activity and oxygen vacancy concentration. Tungsten is earth-abundant, and WO2.72 can be synthesized in large scale using a low-cost procedure, which provides an ideal catalyst for industrial application. Because oxygen vacancy is a common characteristic of many metal oxides, the findings in this work may be extended to other metal oxides and thus provide the possibility for exploring a new type of hydrogenation catalyst.
NEW ACHIEVEMENTS IN THE USE OF ZIRCONIUM COMPLEXES IN THE CHEMISTRY OF ORGANO-ALUMINIUM AND MAGNESIUM COMPOUNDS
Dzhemilev, U. M.
, p. 4333 - 4346 (2007/10/02)
This paper describes some applications of a new reaction of catalytic cyclometallation of α-olefins, norbornenes and their derivatives, and 1,2-disubstituted acetylenes with organomagnesium and organoaluminium compounds effected by zirconium catalysts, leading to a series of five and macrocyclic heterocycles containing magnesium and aluminium.
