Effect of Tethered, Axial Thioether Coordination on Rhodium(II)-Catalyzed Silyl-Hydrogen Insertion
作者:William Sheffield、Anthony Abshire、Ampofo Darko
DOI:10.1002/ejoc.201900977
日期:2019.10.9
Dirhodium paddlewheel complexes with tethered thioether ligands are evaluated in diazo‐mediated Si–H insertion reactions. The presence of the thioether groups improved yields at elevated temperatures and allowed greater selectivity for diazo compounds compared to non‐thioether tethered catalysts. Computational modelling helped to rationalize the results.
Metal-Free Insertion Reactions of Silanes with Aryldiazoacetates
作者:Feifei He、Fang Li、Rene M. Koenigs
DOI:10.1021/acs.joc.9b02605
日期:2020.1.17
Si-H insertion reactions represent an important method for the efficient construction of new C-Si bonds, and typically, they are conducted in the presence of metal catalysts. In this report, we describe a photochemical approach that now allows the insertion of carbenes into the Si-H bond of silanes under metal-free reaction conditions (23 examples, up to 83% yield).
Asymmetric rhodium carbene insertion into the SiH bond: identification of new dirhodium(II) carboxylate catalysts using parallel synthesis techniques
作者:Richard T. Buck、Diane M. Coe、Martin J. Drysdale、Leigh Ferris、David Haigh、Christopher J. Moody、Neil D. Pearson、J.Bobby Sanghera
DOI:10.1016/s0957-4166(03)00035-1
日期:2003.4
Decomposition of methyl 2-diazophenylacetate in the presence of silanes and a chiral dirhodium(II) catalyst results in SiH insertion of the intermediate carbenoid with varying degrees of enantioselectivity. Newchiral dirhodium(II) carboxylatecatalysts were identified using solution phase parallel synthesis techniques.
Parallel synthesis techniques in the identification of new chiral dirhodium(II) carboxylates for asymmetric carbenoid insertion reactions
作者:Richard T. Buck、Diane M. Coe、Martin J. Drysdale、Christopher J. Moody、Neil D. Pearson
DOI:10.1016/s0040-4039(98)01538-x
日期:1998.9
Newchiral dirhodium(II) carboxylatecatalysts for asymmetric carbenoid SiH insertion reactions have been identified using solution phase parallel synthesis techniques.
Process Development of Heterogeneous Rh Catalyzed Carbene Transfer Reactions Under Continuous Flow Conditions
作者:Tahani A. C. A. Bayrakdar、Camille Lescot
DOI:10.1002/cssc.202300596
日期:2023.9.8
In this work, we developed a new continuous process for rhodium catalyzed carbene transfer reactions, by simply packing Rh2(OAc)4 with sand or silica in a column flow reactor. Diazo carbene precursor and different substrates were pumped into the catalytic-column, allowing the synthesis of different products with new C−X bonds (X=O, S, Si, CH2) in good to excellent yields. Furthermore, we could pump