31857-89-3Relevant 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)
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.
Chemoselective Ketone Synthesis by the Addition of Organometallics to N-Acylazetidines
Liu, Chengwei,Achtenhagen, Marcel,Szostak, Michal
, p. 2375 - 2378 (2016/06/09)
A general and highly chemoselective method for the synthesis of ketones by the addition of organometallics to N-acylazetidines via stable tetrahedral intermediates is reported for the first time. The transformation is characterized by its wide substrate scope and exquisite selectivity for the ketone products even when a large excess of nucleophilic reagents is used. Even of broader interest is the use of N-acylazetidines as bench-stable, readily available amide acylating reagents, in which the reactivity is controlled by amide pyramidalization and strain of the four-membered ring to afford synthetically valuable building blocks.
Hydrogen transfer type oxidation of alcohols by rhodium and ruthenium catalyst under microwave irradiation
Takahashi, Masaaki,Oshima, Koichiro,Matsubara, Seijiro
, p. 9201 - 9204 (2007/10/03)
Secondary alcohols were converted into the corresponding ketones by methyl acrylate and rhodium catalyst efficiently under microwave irradiation. Treatment of primary alcohols with the same condition resulted in the recovery of the starting materials. Primary alcohols were converted into aldehydes by hydrogen transfer reaction using methyl vinyl ketone and ruthenium catalyst under microwave irradiation.
