User-Friendly Platinum Catalysts for the Highly Stereoselective Hydrosilylation of Alkynes and Alkenes
作者:Steve Dierick、Emilie Vercruysse、Guillaume Berthon-Gelloz、István E. Markó
DOI:10.1002/chem.201502643
日期:2015.11.16
With a view to addressing the shortcomings of traditional catalysts, a new generation of outstanding N‐ heterocyclic carbene platinum(0) complexes for the hydrosilylation of unsaturated carbon–carbon bonds is reported. Their discovery and application to the stereoselective addition of various silanes to silylated alkynes, terminalacetylenes, and olefins is presented. Insights into the catalytic cycle
Configuration-Dependent Ring Opening of Silyloxiranes: Synthesis of Functionalized Alkenes or Tetrahydrofurans
作者:Jens Lange、Ernst Schaumann
DOI:10.1002/ejoc.200900448
日期:2009.9
cis- and trans-Silyloxiranes with a potential tosylate or bromide leaving group in the β position are available by the diastereospecific reduction of the corresponding alkynes with DIBAL-H and hydrosilylation with silanes, respectively. In the reaction with the anion of a silylthioacetal, the outcome of the reaction is configuration dependent: the cis-oxiranes add nucleophilic methanthiolate and give
Selective Hydrosilylation of 1-Alkynes Using Iridium Catalyst with Biphosphinine Ligand
作者:Yoshihiro Miyake、Eigo Isomura、Masahiko Iyoda
DOI:10.1246/cl.2006.836
日期:2006.8
The iridium-catalyzed hydrosilylation of alkynes in the presence of 4,4′,5,5′-tetramethylbiphosphinine (tmbp) has been explored. The hydrosilylation of alkynes in the presence of tmbp proceeds effectively to give β-(E)-vinylsilanes highly selectively in moderate to high yields, whereas a similar hydrosilylation in the absence of tmbp produces β-(Z)-vinylsilanes selectively. The stereoselectivity of these reactions suggests the importance of the electron-withdrawing properties of tmbp coordinated to iridium.
Allylsilanes in organic synthesis; convenient preparation of synthetic intermediates by catalytic hydrosilation of acetylenic alcohols
作者:Patrick J. Murphy、John L. Spencer、Garry Procter
DOI:10.1016/s0040-4039(00)94428-9
日期:1990.1
Synthetically useful vinylslane-alcohols such as (1) can be easily prepared by the catalytic hydrosilation of the appropriate acetylenic alcohols in high yield, and with excellent regioand stereoselectivity, without the need to protect the hydroxyl group.
Hydrosilylation of alkynes catalyzed by ruthenium carbene complexes
作者:Sarah V. Maifeld、Michael N. Tran、Daesung Lee
DOI:10.1016/j.tetlet.2004.11.025
日期:2005.1
Hydrosilylation of terminal alkynes with a variety of silanes catalyzed by Cl2(PCy3)2RuCHPh (1) affords mainly the Z-isomer via trans addition in excellent yields. The presence of a hydroxyl group in close proximity to the triple bond was observed to exert a strong directing effect, resulting in the highly selective formation of the α-isomer. Intramolecular hydrosilylation of a homopropargylic silyl