[Rh(OH)(cod)]2 (cod = 1,5-Cyclooctadiene): A Highly Efficient Catalyst for 1,4-Hydrosilylation of α,β-Unsaturated Carbonyl Compounds
作者:Atsunori Mori、Tsuyoshi Kato
DOI:10.1055/s-2002-32609
日期:——
[Rh(OH)(cod)]2 (cod: 1,5-cyclooctadiene) is found to be a highly efficient catalyst for 1,4-hydrosilylation of α,β-unsaturated carbonyl compounds leading to enolsilanes. The reaction of 2-cyclohexen-1-one with HSiMe(OEt)2 in the presence of 0.005 mol% of the catalyst without solvent furnishes the corresponding enolsilane in 97% yield at room temperature within 10 min.
Hydrosilylation of α,β-unsaturated nitriles and esters catalyzed by tris (triphenylphosphine)chlororhodium
作者:Iwao Ojima、Miyoko Kumagai、Yoichiro Nagai
DOI:10.1016/s0022-328x(00)87057-6
日期:1976.5
trichlorosilane which afforded β-adduct with acrylonitrile. On the other hand, the hydrosilylation of α,β-unsaturated esters gave rather complex results. The selectivity of the reactions was dramatically affected by the substituent of the ester group and that on the β-carbon. Thus, the hydrosilylation of ethyl acrylate with triethylsilane afforded a β-adduct, but, that of ethyl crotonate using the same hydrosilane
Hydrido(triphenylphosphine)rhodium(I) as an effective catalyst for the regiospecific hydrosilation of α,β-unsaturated carbonyl compounds
作者:T.H. Chan、Guo Zhu Zheng
DOI:10.1016/s0040-4039(00)93388-4
日期:1993.5
Hydridotetrakis(triphenylphosphine)rhodium(I) acts as an effective catalyst for the reactions of alpha,beta-unsaturated carbonyl compounds with silanes to give regioselectively the enol silyl ethers in a 1,4-hydrosilation.
Silylium dual catalysis in living polymerization of methacrylates via <i>In situ</i>
hydrosilylation of monomer
作者:Tieqi Xu、Eugene Y.-X. Chen
DOI:10.1002/pola.27641
日期:2015.8.15
catalyze both 1,4‐hydrosilylation of methyl methacrylate (MMA) with R3SiH to generate the silyl ketene acetal initiator in situ and subsequent living polymerization of MMA. The living characteristics of the MMA polymerization initiated by R3SiH (Et3SiH or Me2PhSiH) and catalyzed by [Et3Si(L)]+[B(C6F5)4]– (L = toluene), which have been revealed by four sets of experiments, enabled the synthesis of the polymers
发现硅离子(“ R 3 Si + ”)催化甲基丙烯酸甲酯(MMA)与R 3 SiH的1,4-加氢硅烷化反应,从而在原位生成甲硅烷基烯酮缩醛引发剂,并随后进行MMA活性聚合。由R 3 SiH(Et 3 SiH或Me 2 PhSiH)引发并由[Et 3 Si(L)] + [B(C 6 F 5)4 ] –(L =甲苯)催化的MMA聚合的活性特征,通过四组实验揭示了这一点,从而使M n受控的聚合物的合成成为可能值(相同或几乎相同于所计算的),窄分子量分布(Đ = 1.05-1.09),和良好定义的链结构H [MMA] Ñ H}。聚合反应也是高效的,具有定量或接近定量的引发效率(I * = 96-100%)。通过1 H NMR监测MMA + Me 2 PhSiH + [Et 3 Si(L)] + [B(C 6 F 5)4 ] -(0.5 mol%)的反应提供了相应原位生成的明确证据SKA中,Me