Fe<sup>II</sup>-catalysed insertion reaction of α-diazocarbonyls into X–H bonds (X = Si, S, N, and O) in dimethyl carbonate as a suitable solvent alternative
作者:Nour Tanbouza、Hoda Keipour、Thierry Ollevier
DOI:10.1039/c9ra07203a
日期:——
The insertion reaction of a broad range of diazo compounds into Si–H bonds was found to be efficiently catalysed by Fe(OTf)2 in an emerging green solvent i.e. dimethyl carbonate (DMC). The α-silylated products were obtained in good to excellent yields (up to 95%). Kinetic studies showed that the extrusion of N2 to form an iron carbene intermediate is rate-limiting. The iron-catalysed insertion reaction
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.
Rhodium(II)-Catalyzed Stereoselective Synthesis of Allylsilanes
作者:David M. Guptill、Carolyn M. Cohen、Huw M. L. Davies
DOI:10.1021/ol4028978
日期:2013.12.20
The rhodium-catalyzed decomposition of 2-(triisopropylsilyl)ethyl aryl- and vinyldiazoacetates results in the stereoselectiveformation of Z-allylsilanes. The transformation is considered to proceed by silyl-directed intramolecular C–H functionalization to form a β-lactone intermediate followed by a silyl-activated extrusion of carbon dioxide.
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).