Unexpected catalytic activity of simple triethylborohydrides in the hydrosilylation of alkenes
作者:M. Zaranek、S. Witomska、V. Patroniak、P. Pawluć
DOI:10.1039/c7cc01531c
日期:——
triethylborohydride-catalysed hydrosilylation of alkenes is reported. The hydrosilylation of certain alkenes, in particular styrenes, vinylsilanes and allyl glycidyl ether, with aromatic hydrosilanes proceeded in a highlyregioselective manner to give Markovnikov products. It is significant that several protocols use NaHBEt3 as a reducing agent generating active catalysts in situ of other hydrosilylation reactions. An
[Me2C(C5H4)2TiMe2]: An Open-Bent Titanocene Catalyst for the Hydrosilylation of Bulky 1,3-Dienes
作者:Pierre Le Gendre、Roxana Pop、Jin Cui、Louis Adriaenssens、Virginie Comte
DOI:10.1055/s-0030-1259687
日期:2011.3
Motivated by our preliminary results on Cp2TiF2-catalysed 1,4-hydrosilylation of monosubstituted dienes, we assessed the performance of several titanium complexes for the hydrosilylation of 2,3-dimethylbutadiene, a representative bulky diene. An open-bent titanocene complex [Me2C(C5H4)2TiMe2] performed the best and proved to be efficient for the hydrosilylation of a variety of substrates such as disubstituted dienes, activated alkenes, and even an acetylene.
Cyclic (Alkyl)(amino)carbene Lanthanide Amides: Synthesis, Structure, and Catalytic Selective Hydrosilylation of Alkenes
作者:Zexiong Pan、Jianying Zhang、Lulu Guo、Hao Yang、Jianfeng Li、Chunming Cui
DOI:10.1021/acs.inorgchem.1c01780
日期:2021.9.6
The first examples of cyclic (alkyl)(amino)carbene (CAAC) lanthanide (Ln) complexes were synthesized from the reaction of CAAC with Yb[N(SiMe3)2]2 and Eu[N(SiMe3)2]2(THF)2 (THF = tetrahydrofuran). The structures of (CAAC)Yb[N(SiMe3)2]2 (2) and (CAAC)Eu[N(SiMe3)2]2(THF) (3) were determined by X-ray diffraction analysis. Density functional theory calculations of 2 revealed the predominantly ionic bond
Magnesium hydride alkene insertion and catalytic hydrosilylation
作者:Lucia Garcia、Chiara Dinoi、Mary F. Mahon、Laurent Maron、Michael S. Hill
DOI:10.1039/c9sc02056j
日期:——
mol-1. This Mg-H/C[double bond, length as m-dash]C insertion reactivity provides the basis for the catalytichydrosilylation of terminal alkenes with PhSiH3, which proceeds with a preference for the formation of the anti-Markovnikov organosilane product. Further DFT calculations reveal that the catalytic reaction is predicated on a sequence of Mg-H/C[double bond, length as m-dash]C insertion and classical
Synthesis of divalent ytterbium terphenylamide and catalytic application for regioselective hydrosilylation of alkenes
作者:Yinghua Shi、Jianfeng Li、Chunming Cui
DOI:10.1039/c7dt01837a
日期:——
5-Me2C6H3)2C6H3NH)Yb(N(SiMe3)2)]2 (1) has been prepared and characterized. This divalent terphenylamido complex enabled highly regioselective hydrosilylation of various terminal alkenes with very low catalyst loadings. The reaction of 1 with phenylsilane at high temperature led to the dehydrogenative coupling of silane with a terphenylamide ligand and redistributions of amide ligands via a hypervalent
已制备并表征了二聚杂配l酰胺配合物[(2,6-(3,5-Me 2 C 6 H 3)2 C 6 H 3 NH)Yb(N(SiMe 3)2)] 2(1)并对其进行了表征。这种二价三联苯胺基络合物能够以极低的催化剂负载量对各种末端烯烃进行高度区域选择性的氢化硅烷化。的反应1与苯基硅烷在高温下导致硅烷与一terphenylamide配体和配体酰胺再分配脱氢耦合经由一个高价硅烷中间体,其已经光谱表征。