20374-77-0Relevant academic research and scientific papers
Dichotomy of Manganese Catalysis via Organometallic or Radical Mechanism: Stereodivergent Hydrosilylation of Alkynes
Yang, Xiaoxu,Wang, Congyang
supporting information, p. 923 - 928 (2018/01/01)
Herein, we disclose the first manganese-catalyzed hydrosilylation of alkynes featuring diverse selectivities. The highly selective formation of E-products was achieved by using mononuclear MnBr(CO)5 with the arsenic ligand, AsPh3. Whereas using the dinuclear catalyst Mn2(CO)10 and LPO (dilauroyl peroxide) enabled the reversed generation of Z-products in good to excellent stereo- and regioselectivity. Such a way of controlling the reaction stereoselectivity is unprecedented. Mechanistic experiments revealed the dichotomy of manganese catalysis via organometallic and radical pathways operating in the E- and Z-selective routes, respectively.
Regio- and stereoselective hydrosilylation of unsymmetrical alkynes catalyzed by a well-defined, low-valent cobalt catalyst
Rivera-Hernández, Alejandro,Fallon, Brendan J.,Ventre, Sandrine,Simon, Cédric,Tremblay, Marie-Hélène,Gontard, Geoffrey,Derat, Etienne,Amatore, Muriel,Aubert, Corinne,Petit, Marc
supporting information, p. 4242 - 4245 (2016/09/09)
Herein, the use of a well-defined low-valent cobalt(I) catalyst [HCo(PMe3)4] capable of performing the highly regio- and stereoselective hydrosilylation of internal alkynes is reported. The reaction can be applied to a variety of hyd
The activity of Pt/SiO2 catalysts obtained by the sol-gel method in the hydrosilylation of 1-alkynes
Jimenez, Rafael,Martinez-Rosales, J. Merced,Cervantes, Jorge
, p. 1370 - 1375 (2007/10/03)
Heterogeneous platinum catalysts (Pt/SiO2) obtained by the sol-gel process at pH 3 and 9 have been used in the hydrosilylation reaction of 1-alkynes using various silanes. Once the catalysts were activated they were used in the hydrosilylation
The differing modes of reaction of 1-(8-dimethylamino-1-naphthyl)-1-hydrodisilane and 1-(1-naphthyl)-1-hydrodisilane in nickel-catalyzed reactions with acetylene: Formation of a pseudo-pentacoordinate silole via Si-Si bond cleavage vs. hydrosilation without Si-Si bond cleavage
Tamao, Kohei,Asahara, Masahiro,Kawachi, Atsushi
, p. 325 - 334 (2007/10/03)
Pseudo-pentacoordinate 1-(8-dimethylamino-1-naphthyl)-1-hydrodisilanes 1 and 2 and the tetracoordinate counterpart 3 have been prepared. In the presence of an Ni(0) complex as catalyst, 1 and 2 undergo degradation to generate a silylene species and a hydrosilane. The complex with Ni of the silylene species from 1 has been trapped with an excess of diphenylacetylene to give a pseudo-pentacoordinate silole 4. The X-ray structure of 4 indicates that this silole occupies two pseudo-equatorial positions. In contrast, the tetracoordinate hydrodisilane 3 undergoes hydrosilation without Si-Si bond cleavage.
