Rhodium-Catalyzed Alkenylation of Nitriles via Silicon-Assisted C−CN Bond Cleavage
摘要:
Rhodium-catalyzed Mizoroki-Heck type reaction of nitriles via the cleavage of C-C bonds is described. Orthogonal and iterative functionalizations of arenes were also demonstrated by combining the present and conventional halide-based cross-coupling reactions.
Direct synthesis of arylalkenylsilanes by [Rh(COD)Cl]2/PPh3-catalyzed dehydrogenative silylation of styrene derivatives with R3SiH (R = alkyl, alkoxy, aryl) was realized, in which norbornene (NBE) and PPh3 play a key role in achieving excellent selectivity in the formation of dehydrogenative silylation products. Moreover, this high-yielding transformation exhibits a broad substrate scope and good functional
A recyclable and reusable K<sub>2</sub>PtCl<sub>4</sub>/Xphos-SO<sub>3</sub>Na/PEG-400/H<sub>2</sub>O system for highly regio- and stereoselective hydrosilylation of terminal alkynes
作者:Caifeng Xu、Bin Huang、Tao Yan、Mingzhong Cai
DOI:10.1039/c7gc02823g
日期:——
K2PtCl4/Xphos-SO3Na in a mixture of poly(ethylene glycol) (PEG-400) and water is shown to be a highly regio- and stereoselective catalyst for the hydrosilylation of terminal alkynes with hydrosilanes. The reaction could be conducted under mild conditions, yielding a variety of functionalized β-(E)-vinylsilanes in good to excellent yields with a total β-(E)-selectivity. The isolation of the products
This report presents the first example of nickel‐catalyzed mild decarboxylative cross‐coupling reaction for the regioselective formation of C–Si bond. An easily accessible and significantly stable Ni (dmg)2 owes the role of key promoter. This reaction is highly functional group tolerant and offers α,β‐unsaturated silanes in synthetically useful yields. The reaction gives access to the successful utilization
Rhodium(I) Complexes Bearing Hydroxyl‐Functionalized 1,2,3‐Triazolylidenes and Their Catalytic Application
作者:Agustín A. de la Fuente‐Olvera、Franciso J. Ruiz‐Mendoza、José M. Vásquez‐Pérez、Myriam Meléndez‐Rodríguez、Alejandro Álvarez‐Hernández、Verónica Salazar‐Pereda、Daniel Mendoza‐Espinosa
DOI:10.1002/ejic.202200401
日期:2022.10.26
We report the synthesis and full characterization of a novel series rhodium(I) complexes (3 a–c) supported by hydroxyl-functionalized 1,2,3-triazolylidenes. Their application as catalysts in the 1,4-addition of boronic acid to 2-cyclohexenone and the hydrosilylation of terminal alkynes is described.
作者:Fonseca-Olvera, Josué G.、Ruiz-Mendoza, Francisco J.、Flores-Ávila, Amador、Meléndez-Rodríguez, Myriam、Suárez-Castillo, Oscar R.、Mendoza-Espinosa, Daniel
DOI:10.1002/ejic.202400145
日期:——
The synthesis and full characterization of a series of heterometallic Au(I)/Pd(II) and chelated Pd(II) complexes supported by heteroditopic imidazol-2-ylidene/triazol-5-ylidene ligands is reported. The new biscarbenic palladium(II) complexes were tested as catalysts in the cross-coupling of boronic acid to a variety of chloroarenes and the hydrosilylation of terminal alkynes. Both catalytic processes