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.
Manganese-Catalyzed Dehydrogenative Silylation of Alkenes Following Two Parallel Inner-Sphere Pathways
作者:Stefan Weber、Manuel Glavic、Berthold Stöger、Ernst Pittenauer、Maren Podewitz、Luis F. Veiros、Karl Kirchner
DOI:10.1021/jacs.1c09175
日期:2021.10.27
of aromatic and aliphaticalkenes was efficiently and selectively converted into E-vinylsilanes and allylsilanes, respectively, at room temperature. Mechanistic insights are provided based on experimental data and DFT calculations revealing that two parallel reaction pathways are operative: an acceptorless reaction pathway involving dihydrogen release and a pathway requiring an alkene as sacrificial
Ligand-Controlled Regiodivergent Silylation of Allylic Alcohols by Ni/Cu Catalysis for the Synthesis of Functionalized Allylsilanes
作者:Yi Gan、Wei Xu、Yuanhong Liu
DOI:10.1021/acs.orglett.9b03822
日期:2019.12.6
Ni/Cu-catalyzed regiodivergent synthesis of allylsilanes directly from allylicalcohols through modulating the steric and electronic properties of the ligands on the nickel catalyst has been developed. Good yields and excellent selectivity were obtained regardless of whether linear or α-branched allylicalcohols were utilized. Mechanistic studies indicate that an allyloxyboronate species is formed during the
challenge in organic synthesis, with current methods suffering from low selectivity and narrow scope. In this study, we report a general and simple method for the manganese-catalysed dehydrosilylation and hydrosilylation of alkenes, with Mn2(CO)10 as a catalyst precursor, by using a ligand-tuned metalloradical reactivity strategy. This enables versatility and controllable selectivity with a 1:1 ratio
Manganese catalyzed dehydrogenative silylation of alkenes: Direct access to allylsilanes
作者:Shang Wu、Ying Zhang、Hongyan Jiang、Ning Ding、Yanbin Wang、Qiong Su、Hong Zhang、Lan Wu、Quanlu Yang
DOI:10.1016/j.tetlet.2020.152053
日期:2020.6
Dehydrogenativesilylation of alkenes with silanes to produce allylsilanes is achieved through manganese catalysis with a wide scope of substrate tolerance. This transformation involves silane radicals initiated by manganese complex without additional oxidant additives. It offers a general, convenient and practical protocol with excellent functional group compatibility and gram-scale capacity for the