Application of Bulky NHC–Rhodium Complexes in Efficient S–Si and S–S Bond Forming Reactions
作者:Małgorzata Bołt、Patrycja Żak
DOI:10.1021/acs.inorgchem.1c02160
日期:2021.12.6
methodologies are based on new rhodium complexes containing bulky N-heterocyclic carbene (NHC) ligands that turned out to be efficient catalysts in thiol and thiol–silane coupling reactions. These green protocols, which use easily accessible reagents, allow obtaining compounds containing S–Si and S–S bonds in solvent-free conditions. Additionally, preliminary tests on coupling of mono- and octahydro-substituted
Efficient ruthenium-catalysed S–S, S–Si and S–B bond forming reactions
作者:José A. Fernández-Salas、Simone Manzini、Steven P. Nolan
DOI:10.1039/c3cc43145b
日期:——
[RuCl(PPh3)2(3-phenylindenyl)] (1) has been shown to be an efficient catalyst in thiol dehydrogenative coupling to give disulfides. Moreover, an efficient procedure for the preparation of silylthioethers and thioboranes is presented. Complex 1 demonstrated a great ability to catalyse the coupling of thiols with silanes and boranes under mild conditions with excellent results (turnover number up to 200).
The silylation/germylation of several disulfides/diselenides has been established by using commercially available ruthenium catalyst. As a result, several silylthioethers and their germanium and selenium analogs have been synthesized. Notably, the obtained thiosilanes were subsequently utilized in nucleophilic aromatic substitution reaction, leading to unsymmetrical sulfides.
Ruthenium carbonyl-catalysed Si–heteroatom X coupling (X = S, O, N)
作者:Chun Keong Toh、Hwa Tiong Poh、Ching Si Lim、Wai Yip Fan
DOI:10.1016/j.jorganchem.2012.07.024
日期:2012.10
Ru-3(CO)(12) has been shown to catalyse the coupling of silanes with thiols, alcohols and amines with turnover number (TON) and turnover frequency (TOF) of up to 200 and 50 h(-1) at 80 degrees C. IR, NMR and mass spectroscopic studies have identified a ruthenium dimer complex, [Ru(CO)(4)(SiEt3)](2) as a likely resting state of the catalyst. A mechanism involving this complex has been proposed for the siliconethiol coupling process. (C) 2012 Elsevier B.V. All rights reserved.