6836-42-6Relevant articles and documents
Ru-containing polyoxometalate fabricated on graphene oxide: Preparation, characterization and catalytic activity
Ma, Zhiyuan,Yu, Tian,Bi, Lihua
, p. 16 - 22 (2019/04/08)
Polyoxometalates (POMs) with remarkable redox characteristics and good stability are considered as versatile catalysts, meanwhile graphene oxide (GO) with a layered structure and myriad oxygen atoms on its surface is also good catalyst. Thus their combination will have the synergistically enhanced effect on the catalytic performance and the reusability of the heterogeneous catalysts. Here, an environmentally-friendly heterogeneous catalyst (GO/PEI/RuPW10) was prepared by fabricating [(γ-PW10O36)2Ru4O5(OH)(H2O)4]9- (RuPW10) on the surface of GO functionalized by polyethylenimine (PEI). Further, this catalyst was applied to n-tetradecane oxidation using air as the oxidant. The results showed that 4.73% RuPW10 loaded catalyst exhibits high conversion (50.45%) of n-tetradecane under the optimized reaction condition. A recyclability test suggested that this catalyst can be reused up to five times without significant changes for the conversion of n-tetradecane. As a result, due to the high conversion, better stability and reusability, immobilizing POMs onto the surface of GO modified by PEI is one of the effective means to develop heterogeneous catalysts.
Stoichiometric reactions of acylnickel(II) complexes with electrophiles and the catalytic synthesis of ketones
Wotal, Alexander C.,Ribson, Ryan D.,Weix, Daniel J.
supporting information, p. 5874 - 5881 (2015/01/09)
Acylnickel(II) complexes feature prominently in cross-electrophile coupling (XEC) reactions that form ketones, yet their reactivity has not been systematically investigated. We present here our studies on the reactivity of acylnickel(II) complexes with a series of carbon electrophiles. Bromobenzene, α-chloroethylbenzene, bromooctane, and iodooctane were reacted with (dtbbpy)NiII(C(O)C5H11)(Br) (1b) and (dtbbpy)NiII(C(O)tolyl)(Br) (1c) to form a variety of organic products. While reactions with bromobenzene formed complex mixtures of ketones, reactions with α-chloroethylbenzene were highly selective for the cross-ketone product. Reactions with iodooctane and bromooctane also produced the cross-ketone product, but in intermediate yield and selectivity. In most cases the presence or absence of a chemical reductant (zinc) had only a small effect on the selectivity of the reaction. The coupling of 1c with iodooctane (60% yield) was translated into a catalytic reaction, the carbonylative coupling of bromoarenes with primary bromoalkanes (six examples, 60% average yield).
Facile synthesis of ketones from 1,1-disilylethenes via oxidation of gem-disilylalkanes
Inoue, Atsushi,Kondo, Junichi,Shinokubo, Hiroshi,Oshima, Koichiro
, p. 114 - 115 (2007/10/03)
The oxidation of gem-disilylalkanes, which can be derived from 1,1-disilylethene, alkyllithiums and alkyl halides, affords the corresponding ketones.
