Enock D. Amoateng, Bruno Donnadieu, Evans Fosu, T. Keith Hollis
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引用次数: 0
Abstract
Selective dehydrogenative silylation of vinylarenes with tertiary silanes catalyzed by well-defined CCC–NHC pincer Rh complexes has been developed. The CCC–NHC pincer Rh precatalysts [(BuCiCiCBu)RhCl(µ-Cl)2Rh(COD)] (7), [(BuCiCiCBu)RhCl(µ-Cl)]2 (8), [(BuCiCiCBu)RhCl2(NHMe2)] (9), and [(BuCiCiCBu)RhCl2Py] (10), (BuCiCiCBu = 2-((1,3-bis(N-butylimidazol-2-ylidene)phenylene) that were evaluated were all found to promote the dehydrogenative silylation of vinylarenes with Et3SiH to selectively form the corresponding (E)-alkenylsilane under solvent-free conditions. The most active precatalyst was the novel mixed valent Rh(III)/Rh(I) complex, [(BuCiCiCBu)RhCl(µ-Cl)2Rh(COD)] (7). The catalytic system displays wide substrate scope. Electron rich and electron deficient vinylarenes were well tolerated affording the corresponding alkenylsilanes in good yields (65–86 %). Preliminary mechanistic investigations indicated that the Rh(III) center was responsible for the catalytic performance.
期刊介绍：
The Journal of Organometallic Chemistry targets original papers dealing with theoretical aspects, structural chemistry, synthesis, physical and chemical properties (including reaction mechanisms), and practical applications of organometallic compounds.
Organometallic compounds are defined as compounds that contain metal - carbon bonds. The term metal includes all alkali and alkaline earth metals, all transition metals and the lanthanides and actinides in the Periodic Table. Metalloids including the elements in Group 13 and the heavier members of the Groups 14 - 16 are also included. The term chemistry includes syntheses, characterizations and reaction chemistry of all such compounds. Research reports based on use of organometallic complexes in bioorganometallic chemistry, medicine, material sciences, homogeneous catalysis and energy conversion are also welcome.
The scope of the journal has been enlarged to encompass important research on organometallic complexes in bioorganometallic chemistry and material sciences, and of heavier main group elements in organometallic chemistry. The journal also publishes review articles, short communications and notes.
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