61210-59-1Relevant articles and documents
Air-stable and reusable cobalt ion-doped titanium oxide catalyst for alkene hydrosilylation
Mitsudome, Takato,Fujita, Shu,Sheng, Min,Yamasaki, Jun,Kobayashi, Keita,Yoshida, Tomoko,Maeno, Zen,Mizugaki, Tomoo,Jitsukawa, Koichiro,Kaneda, Kiyotomi
supporting information, p. 4566 - 4570 (2019/08/21)
Alkene hydrosilylation is important for the synthesis of organosilicon compounds, for which precious metal complexes have been used as industrial catalysts. Considering environmental and economic concerns, the development of earth-abundant metal catalysts with high stability, easy separability, and high reusability is strongly desired. Herein, we report that a new cobalt ion-doped titanium dioxide (Co/TiO2) catalyst was synthesized by hydrogen treatment method. The Co/TiO2 catalyst acts as a highly efficient heterogeneous catalyst for the anti-Markovnikov hydrosilylation of alkenes under solvent-free conditions. Various alkenes were selectively converted to the corresponding alkylsilanes. This catalyst showed high stability in air and high reusability with maintained activity. The investigation of the relationship between the active site structure and catalytic performance of Co/TiO2 disclosed that the high stability and durability of Co/TiO2 are originated from the strong interaction between Co and TiO2 through the formation of CoTiO3 solid solution species.
(Aminomethyl)pyridine Complexes for the Cobalt-Catalyzed Anti-Markovnikov Hydrosilylation of Alkoxy- or Siloxy(vinyl)silanes with Alkoxy- or Siloxyhydrosilanes
Lee, Kangsang L.
supporting information, p. 3665 - 3669 (2017/03/21)
Cobalt-catalyzed anti-Markovnikov reactions that involve siloxy- or alkoxy(vinyl)silanes and siloxy- or alkoxyhydrosilanes are disclosed. More than 25 new cobalt–(aminomethyl)pyridine complexes were developed as catalysts for the hydrosilylation of indust
Visible-Light-Mediated Metal-Free Hydrosilylation of Alkenes through Selective Hydrogen Atom Transfer for Si?H Activation
Zhou, Rong,Goh, Yi Yiing,Liu, Haiwang,Tao, Hairong,Li, Lihua,Wu, Jie
supporting information, p. 16621 - 16625 (2017/12/13)
Although there has been significant progress in the development of transition-metal-catalyzed hydrosilylations of alkenes over the past several decades, metal-free hydrosilylation is still rare and highly desirable. Herein, we report a convenient visible-
Catalysis of hydrosilylation: Part XXXIV. High catalytic efficiency of the nickel equivalent of Karstedt catalyst [{Ni(η-CH2=CHSiMe2)2O} 2{μ-(η-CH2=CHSiMe2)2O}]
Maciejewski,Marciniec,Kownacki
, p. 175 - 181 (2007/10/03)
The nickel equivalent of Karstedt catalyst [{Ni(η-CH2=CHSiMe2)2O} 2{μ-(η-CH2=CHSiMe2)2O}] (1) appeared to be a very efficient catalyst for dehydrogenative coupling of vinyl derivatives (styrene, vinylsilanes, vinylsiloxanes) with trisubstituted silanes HSi(OEt)3, HSiMe2Ph. The reaction occurs via three pathways of dehydrogenative coupling, involving formation of an unsaturated compound as the main product as well as a hydrogenated olefin (DS-1) pathway, hydrogenated dimeric olefin (DS-2) and dihydrogen (DC), respectively. The reaction is accompanied by side hydrosilylation. Stoichiometric reactions of 1 with styrene and triethoxysilane, in particular synthesis of the bis(triethoxysilyl) (divinyltetramethyldisiloxane) nickel complex 3 and the first documented insertion of olefin (styrene) into Ni-Si bond of complex 3, as well as all catalytic data have allowed us to propose a scheme of catalysis of this complex reaction by 1.
