Ligand-Controlled Remarkable Regio- and Stereodivergence in Intermolecular Hydrosilylation of Internal Alkynes: Experimental and Theoretical Studies
作者:Shengtao Ding、Li-Juan Song、Lung Wa Chung、Xinhao Zhang、Jianwei Sun、Yun-Dong Wu
DOI:10.1021/ja405752w
日期:2013.9.18
The first highly efficient ligand-controlled regio- and stereodivergent intermolecular hydrosilylations of internal alkynes have been disclosed. Cationic ruthenium complexes [Cp*Ru(MeCN)3](+) and [CpRu(MeCN)3](+) have been demonstrated to catalyze intermolecular hydrosilylations of silyl alkynes to form a range of vinyldisilanes with excellent but opposite regio- and stereoselectivity, with the former
Increasing the Structural Span of Alkyne Metathesis
作者:Peter Persich、Josep Llaveria、Rudy Lhermet、Teresa de Haro、Robert Stade、Azusa Kondoh、Alois Fürstner
DOI:10.1002/chem.201302320
日期:2013.9.23
new generation of alkyne metathesis catalysts, which are distinguished by high activity and an exquisite functional group tolerance, allows the scope of this transformation to be extended beyond its traditional range. They accept substrates that were previously found problematic or unreactive, such as propargyl alcohol derivatives, electron‐deficient and electron‐rich acetylenes of various types, and
Hydroalumination of silylacetylenes: a novel and highly stereoselective synthesis of (E)-telluro(silyl)ketene acetals and their applications in Sonogashira cross-coupling reactions
作者:Cristiane Y. Kawasoko、Carlos E.D. Nazario、Amanda S. Santana、Luiz H. Viana、Gabriela R. Hurtado、Francisco A. Marques、Gustavo Frensch、Paulo R. de Oliveira、Palimécio G. Guerrero、Diego B. Carvalho、Adriano C.M. Baroni
DOI:10.1016/j.tetlet.2011.08.147
日期:2011.11
alanates intermediates, which were trapped with butyltellurenyl bromide (C4H9TeBr), furnishing exclusively the (E)-1-butyltelluro-1-tri(organyl)silyl-2-organyl-1-alkenes in 45–70% yields. These telluro(silyl)ketene acetals were utilized as substrates in Sonogashira cross-coupling Pd-catalyzed reactions, furnishing the (Z)-1,4-diorganyl-2-tri(organyl)silyl-1-buten-3-ynes with total control of regio- and stereochemistry
用DIBAL-H silylacetylenes的铝氢化,随后加入的Ñ原位产生的(正丁基锂Ž)-β-vinylorganosilane铝氢化物中间体,其被捕获与butyltellurenyl溴化物(C 4 H ^ 9 TeBr),家具完全(ë) -1-丁基telluro-1-三(有机基)甲硅烷基-2-有机基-1-烯烃,产率为45-70%。这些碲(甲硅烷基)乙烯酮缩醛被用作Sonogashira交叉偶联钯催化的反应的底物,从而提供了(Z)-1,4-二有机基-2-三(有机基)甲硅烷基-1-丁烯-3-炔控制区域化学和立体化学的产率为62-80%。
Cross-Metathesis of Terminal Alkynes
作者:Rudy Lhermet、Alois Fürstner
DOI:10.1002/chem.201404166
日期:2014.10.6
Terminal acetylenes are amongst the most problematic substrates for alkynemetathesis because they tend to undergo rapid polymerization on contact with a metal alkylidyne. The molybdenum complex 3 endowed with triphenylsilanolate ligands, however, is capable of inducing surprisingly effective cross‐metathesis reactions of terminal alkyl acetylenes with propynyl(trimethyl)silane to give products of
Ru-Catalyzed Geminal Hydroboration of Silyl Alkynes via a New <i>gem</i>-Addition Mechanism
作者:Qiang Feng、Haonan Wu、Xin Li、Lijuan Song、Lung Wa Chung、Yun-Dong Wu、Jianwei Sun
DOI:10.1021/jacs.0c05334
日期:2020.8.12
mode of alkynehydroboration, herein we describe a new 1,1-hydroboration mode. It is the first demonstration of gem-(H,B) addition to an alkyne triple bond. With the superior [CpRu(MeCN)3]PF6 catalyst, a range of silyl alkynes reacted efficiently with HBpin under mild conditions to form various synthetically useful silyl vinyl boronates with complete stereoselectivity and broad functional group compatibility