合成了含有(五甲基环戊二烯基)铱(III)单元的一组iridacycles [{C,N} Cp * Ir III -Cl]({C,N} =苯并[ h ]喹啉,二苯并[ f,h ]喹啉)并衍生为与BArF型阴离子缔合的阳离子[{C,N} Cp * Ir-NCMe] +。后者的盐因其在H 2中对HSiEt 3的潜在催化性能而进行了基准测试-释放测试反应。表现最佳的BArF型盐显示出能够以低的催化负载量(大约)促进反应的能力。乙腈,丙腈和一系列芳腈底物的自动串联氢化硅烷化为0.5–1 mol%。机理研究证实,Si-H键的亲电和杂合活化可初步形成硅烷-铱环加合物。通过X射线衍射分析解析了这种加合物的新实例的分子结构。理论上的考虑支持了施主-受主[{C,N} Cp * Ir III -H]→[SiEt 3 ] +({C,N} =苯并[ h ]喹啉基)的配方,其中阳离子甲硅烷基部分充当Z配体结合Ir和
Tandem deuteration/hydrosilylation reactions catalyzed by a rhodium carbene complex under solvent-free conditions
作者:Jonathan D. Egbert、Steven P. Nolan
DOI:10.1039/c2cc17196a
日期:——
The complex [Rh(ItBu)2HCl] has been shown to be an active catalyst in the hydrosilylation of carbonyl and imine complexes. This reactivity, combined with the previously reported H/D exchange catalyzed by these complexes allows for a one pot, two step reaction using a single catalyst for both H/D exchange and hydrosilylation. Using triethylsilane, [Rh(ItBu)2Cl] catalyst, and D2 gas, deuterated silyl-ethers can be synthesized in an atom-economical, solvent-free reaction.
Silyl formates as hydrosilane surrogates for the transfer hydrosilylation of ketones
作者:R. Martin Romero、Neethu Thyagarajan、Nora Hellou、Clément Chauvier、Timothé Godou、Lucile Anthore-Dalion、Thibault Cantat
DOI:10.1039/d2cc00666a
日期:——
A transfer hydrosilylation of ketones employing silyl formates as hydrosilane surrogates under mild conditions is presented. A total of 24 examples of ketones have been successfully converted to their corresponding silyl ethers with 61–99% yields in the presence of a PNHP-based ruthenium catalyst and silyl formate reagent. The crucial role of the ligand for the transformation is demonstrated.
介绍了在温和条件下使用甲硅烷基甲酸酯作为氢化硅烷替代物的酮的转移氢化硅烷化。在 PN H P 基钌催化剂和甲酸甲硅烷酯试剂存在下,共有 24 个酮类实例成功地转化为相应的甲硅烷基醚,产率为 61-99% 。证明了配体对转化的关键作用。
Pd-catalyzed selective hydrosilylation of aryl ketones and aldehydes
作者:Pandurang V. Chouthaiwale、Varun Rawat、Arumugam Sudalai
DOI:10.1016/j.tetlet.2011.10.155
日期:2012.1
Pd salts in combination with triethylsilane as hydride source and DMF as solvent has been found to be excellent catalytic combination that selectively reduces aryl ketones and aldehydes under mild conditions to afford triethylsilyloxy compounds in excellent yields. Product selectivity to the respective benzyl alcohols can however be achieved when the reaction was performed in DMF/H2O (4:1) as solvent system. (C) 2011 Elsevier Ltd. All rights reserved.
Iridacycles as Catalysts for the Autotandem Conversion of Nitriles into Amines by Hydrosilylation: Experimental Investigation and Scope
heterolytic activation of the Si–H bond. The molecular structure of a new example of such an adduct was resolved by X-ray diffraction analysis. Theoretical considerations support a donor–acceptor [C,N}Cp*IrIII-H]→[SiEt3]+ (C,N} = benzo[h]quinolinyl) formulation where the cationic silyl moiety acting as a Z ligand binds both Ir and H centers. Under the conditions of the catalysis, the latter adduct is assumed
合成了含有(五甲基环戊二烯基)铱(III)单元的一组iridacycles [C,N} Cp * Ir III -Cl](C,N} =苯并[ h ]喹啉,二苯并[ f,h ]喹啉)并衍生为与BArF型阴离子缔合的阳离子[C,N} Cp * Ir-NCMe] +。后者的盐因其在H 2中对HSiEt 3的潜在催化性能而进行了基准测试-释放测试反应。表现最佳的BArF型盐显示出能够以低的催化负载量(大约)促进反应的能力。乙腈,丙腈和一系列芳腈底物的自动串联氢化硅烷化为0.5–1 mol%。机理研究证实,Si-H键的亲电和杂合活化可初步形成硅烷-铱环加合物。通过X射线衍射分析解析了这种加合物的新实例的分子结构。理论上的考虑支持了施主-受主[C,N} Cp * Ir III -H]→[SiEt 3 ] +(C,N} =苯并[ h ]喹啉基)的配方,其中阳离子甲硅烷基部分充当Z配体结合Ir和