Copper-Mediated Transformation of Organosilanes to Nitriles with DMF and Ammonium Iodide
摘要:
Cyanation of aryl-, diaryldimethyl-, and styrylsilanes was developed for the first time under copper-mediated oxidative conditions using ammonium iodide and DMF as the combined source of nitrogen and carbon atom of the introduced cyano unit, respectively. The reaction was observed to proceed in a two-step process: initial conversion of organosilanes to their iodo intermediates and then cyanation. This method has a broad substrate scope with high functional group tolerance.
Reaction of hydrosilanes with alkynes catalyzed by gold nanoparticles supported on TiO2
作者:Androniki Psyllaki、Ioannis N. Lykakis、Manolis Stratakis
DOI:10.1016/j.tet.2012.08.021
日期:2012.10
Gold nanoparticles supported on TiO2 (0.8–1.4 mol %) catalyze the β-(E) regioselective hydrosilylation of a variety of functionalized terminal alkynes with alkylhydrosilanes in 1,2-dichloroethane (70 °C). The product yields are excellent, and the reaction times relatively short, while almost equimolar amounts of alkynes and hydrosilanes can be used. Minor side-products in up to 35% relative yield of
A Rh(I) complex with an annulated N-heterocyclic carbene ligand for E-selective alkyne hydrosilylation
作者:Akshi Tyagi、Suman Yadav、Prosenjit Daw、Chitrakar Ravi、Jitendra K. Bera
DOI:10.1016/j.poly.2019.04.027
日期:2019.11
A Rh(I) complex supported by a fused pi-conjugated imidazo[1,2-a][1,8]naphthyridine-based N-heterocyclic carbene ligand with a Dipp attachment on the imidazole nitrogen has been synthesized and structurally characterized. The title complex is found to be an excellent catalyst for accessing E-vinylsilanes. The scope of the chemoselective hydrosilylation is examined for a range of terminal alkynes with silanes Et3SiH and (EtO)(3)SiH. (C) 2019 Elsevier Ltd. All rights reserved.
Distinct Catalytic Performance of Dirhodium(II) Complexes with <i>ortho</i>-Metalated DPPP in Dehydrosilylation of Styrene Derivatives with Alkoxysilanes
provided a stable and rigid dirhodium(II) complex with ortho-metalated DPPP as the bridging ligand and the phosphonate as the axial ligand in the catalytic system. The structure of the dirhodium(II) complexes was also supported by X-raycrystal diffraction. Further experiments confirmed that the dirhodium(II) complexes may be the active species that catalyze the dehydrosilylation reaction. Control experiments
Copper-Mediated Transformation of Organosilanes to Nitriles with DMF and Ammonium Iodide
作者:Zhen Wang、Sukbok Chang
DOI:10.1021/ol400659p
日期:2013.4.19
Cyanation of aryl-, diaryldimethyl-, and styrylsilanes was developed for the first time under copper-mediated oxidative conditions using ammonium iodide and DMF as the combined source of nitrogen and carbon atom of the introduced cyano unit, respectively. The reaction was observed to proceed in a two-step process: initial conversion of organosilanes to their iodo intermediates and then cyanation. This method has a broad substrate scope with high functional group tolerance.