Bis(2-thienyl)silanes: new, versatile precursors to arylsilanediols
摘要:
Silanediols have been shown to be effective bioisosteres for the hydrated carbonyl group. Current methods for the formation of silanediols place a number of constraints on how and where this functionality may be used. A range of arylsilanes that would allow both the formation of arylsilanediols and that are also compatible with multi-step synthetic routes, have been investigated as possible precursors to silanediols. Through this study bis(2-furyl)silanes and, in particular, bis(2-thienyl)si lanes have been identified as practical precursors to arylsilanediols. (c) 2006 Elsevier Ltd. All rights reserved.
Well-defined NHC-rhodium hydroxide complexes as alkenehydrosilylation and dehydrogenative silylation catalysts
作者:Byron J. Truscott、Alexandra M. Z. Slawin、Steven P. Nolan
DOI:10.1039/c2dt31339a
日期:——
Alkene hydrosilylation and dehydrogenative silylation reactions, mediated by [Rh(cod)(NHC)(OH)] complexes (cod = 1,5-cyclooctadiene; NHC = N-heterocyclic carbene) are described. The study details a comparison of the catalytic activity and steric characteristics of four rhodium complexes bearing different NHC ligands. The novel [Rh(cod)(Ii-PrMe)(OH)] complex (Ii-PrMe = 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidine) was designed to improve the reactivity of Rh(I)-hydroxides and proved to be a successful promoter of hydrosilylation and dehydrogenative silylation, displaying good stereo- and regiocontrol.
Regioselective hydrosilylation of aliphatic olefins catalyzed by Co-iminobipyridine complexes, Co〈R〉, were investigated, where R indicates a substituent on the imino nitrogen in an iminobipyridine ...
研究了由 Co-亚氨基联吡啶配合物 Co 催化的脂肪族烯烃的区域选择性氢化硅烷化,其中 R 表示亚氨基联吡啶中亚氨基氮上的取代基......
Highly Regioselective Rhenium-Catalyzed Hydrosilylation of Styrenes
Tuning the redox non-innocence of a phenalenyl ligand toward efficient nickel-assisted catalytic hydrosilylation
作者:Gonela Vijaykumar、Anand Pariyar、Jasimuddin Ahmed、Bikash Kumar Shaw、Debashis Adhikari、Swadhin K. Mandal
DOI:10.1039/c7sc04687a
日期:——
hydrosilylation has been investigated. A phenalenyl ligandcoordinatednickelcomplex has been utilized as an electron reservoir to develop a base metal-assisted catalyst, which very efficiently hydrosilylates a wide variety of olefin substrates under ambient conditions. A mechanistic investigation revealed that a two-electron reduced phenalenyl based biradical nickelcomplex plays the key role in such catalysis