Large-scale preparation and labelling reactions of deuterated silanes
作者:Jesús Campos、Miguel Rubio、Ana C. Esqueda、Ernesto Carmona
DOI:10.1002/jlcr.1950
日期:2012.1
A catalytic synthesis of deuterated silanes SiEt3D, SiMe2PhD and SiPh2D2 is reported that allows their facile generation in a 3–4 g scale, utilizing D2 (0.5 bar) as the hydrogen isotope source and low catalyst loadings (0.01 mol%). The catalyst precursor is the rhodium (III) complex 1, which contains a (η5-C5Me5)Rh cation stabilized by coordination to a cyclometallated phoshine PMeXyl2 (Xyl = 2,6-C6H3Me2)
Phosphirenium Ions as Masked Phosphenium Catalysts: Mechanistic Evaluation and Application in Synthesis
作者:Danila Gasperini、Samuel E. Neale、Mary F. Mahon、Stuart A. Macgregor、Ruth L. Webster
DOI:10.1021/acscatal.1c01133
日期:2021.5.7
catalytic cycle. A competing off-cycle process leading to vinyl phosphine formation is detailed for the hydrosilylation of benzophenone for which an inverse order in [silane] is observed. Experimentally, the formation of side products, including off-cycle vinyl phosphine, is favored by electron-donating substituents on the phosphirenium cation, while catalytic hydrosilylation is promoted by electron-withdrawing
Fluoride ion-catalyzed reduction of aldehydes and ketones with hydrosilanes. Synthetic and mechanistic aspects and an application to the threo-directed reduction of .alpha.-substituted alkanones
作者:Makoto Fujita、Tamejiro Hiyama
DOI:10.1021/jo00258a003
日期:1988.11
First gold complex-catalysed selective hydrosilylation of organic compounds
The first examples of the hydrosilylation of organic compounds
such as aldehydes and an aldimine using a catalytic amount of a gold
complex, which accomplished versatile regio- and chemo-selective reduction
of carbonyl compounds, are described.
Cationic rhenium(<scp>iii</scp>) complexes: synthesis, characterization, and reactivity for hydrosilylation of aldehydes
作者:Damaris E. Pérez、Jessica L. Smeltz、Roger D. Sommer、Paul D. Boyle、Elon A. Ison
DOI:10.1039/c7dt00271h
日期:——
hydrosilylation reaction of aldehydes using 4a (0.03 mol%) has been demonstrated to be significantly more active than rhenium catalysts previously reported in the literature. The data suggest that electron-withdrawing substituents at the diamido amine ligand increase the catalytic efficiency of the complexes. Excellent yields were achieved at ambient temperature under neat conditions using dimethylphenylsilane.
一系列新颖的阳离子Re(III)络合物[(DAAm)Re(CO)(NCCH 3)2 ] [X] [DAAm = N,N-双(2-芳基氨基乙基)甲胺; 芳基= C 6 F 5(a),Mes(b)] [X = OTf(2),BAr F 4 [BAr F 4 =四[3,5-(三氟甲基)苯基]硼酸酯](3),BF 4(4),PF 6(5)]及其类似物[(DAmA)Re(CO)(Cl)2 ] [DAmA = N,N-双(2-芳基胺乙基)甲基氨基;合成了芳基= C 6 F 5 ](6)。已证明使用4a(0.03 mol%)进行醛的氢化硅烷化反应的催化效率比以前在文献中报道的rh催化剂更具活性。数据表明,二氨基胺配体上的吸电子取代基提高了配合物的催化效率。使用二甲基苯基硅烷在环境温度和纯净条件下获得了优异的收率。该反应提供高达9200的TON和高达126h -1的TOF 。进行了动力学和机理研究,数据表明该反应是通过