26741-29-7Relevant academic research and scientific papers
SiO2-Supported Rh Catalyst for Efficient Hydrosilylation of Olefins Improved by Simultaneously Immobilized Tertiary Amines
Motokura, Ken,Maeda, Kyogo,Chun, Wang-Jae
, p. 4637 - 4641 (2017/07/24)
The simultaneous immobilization of a Rh complex and a tertiary amine on a SiO2 surface afforded a highly active supported catalyst for the hydrosilylation of terminal olefins. The turnover number in the reaction using 0.00005 mol % of the Rh catalyst approached 1 900 000 over 24 h. A broad range of terminal olefins and hydrosilanes acted as good substrates, giving their corresponding hydrosilylation products in excellent yields. CSI-mass analysis of the precursor solution containing the Rh complex and tertiary amine indicated complexation between these two precursors. The resultant close positioning of the Rh complex and amine after attachment onto SiO2 surface led to excellent catalysis.
STEREO- AND REGIOSELECTIVITY OF THE CATALYTIC SYSTEM MoCl5/SiO2-SnMe4 IN THE REACTION OF METATHESIS AND COMETATHESIS OF OLEFINS AND THEIR FUNCTIONAL DERIVATIVES
Bykov, V. I.,Butenko, T. A.,Finkel'shtein, E. Sh.
, p. 151 - 155 (2007/10/02)
It was shown that the catalytic system MoCl5/SiO2-SnMe4 has almost 100percent regioselectivity with respect to olefins.The stereoselectivity of the system is not a function of the length of the α-olefin chain, temperature, or addition of functional groups (COOEt, Cl).Addition of pentachlorophenoxy and 8-hydroxyquinolyl ligands significantly reduces the activity of the catalytic system with a slight increase in the stereoselectivity with respect to the cis-isomer.
A Simple, Mild Elimination of Hydrogen Halide from Primary Alkyl Bromides and Iodides
Jeropoulos, Sotiris,Smith, Edward H.
, p. 1621 - 1622 (2007/10/02)
Addition of a solution of a primary alkyl bromide or iodide and 1,8-diazabicycloundec-7-ene in tetrahydrofuran (THF) to a solution prepared from dichlorobis(triphenylphosphine)nickel, triphenylphosphine, and n-butyl-lithium in THF results in an elimination at room temperature to give, in most cases, the terminal alkene.
