1072-63-5Relevant articles and documents
Highly Recoverable Pd(II) Catalysts for the Mizoroki-Heck Reaction Based on N-Heterocyclic Carbenes and Poly(benzyl ether) Dendrons
Ortiz, Alba,Gómez-Sal, Pilar,Flores, Juan C.,De Jesús, Ernesto
, p. 3598 - 3610 (2018)
Two series of bis(imidazolylidene)palladium complexes of general formula [PdBr2(NHC)2] have been prepared. The molecular weight of the complexes was enlarged by bonding poly(benzyl ether) dendrons of increasing size (G0 to G3) at the nitrogen atom of the NHC ligands. Complexes 1-4 contain monodentate NHC ligands coordinated in a trans mode, whereas complexes 9-12 contain a chelating ethylene-bridged bis(NHC) ligand. The complexes were recovered from the product stream of a Mizoroki-Heck reaction by nanofiltration through thermally and chemically stable ceramic membranes. The recoverability is better for larger complexes and chelate ligands. In particular, chelate G3 complex 12 maintained a constant activity during the 13 recovery cycles performed, affording an accumulated turnover number (TON) of 13a€000. On average, around 99.5% of the metal is recovered in each recovery cycle, and contamination by palladium is only 3 mg per kg of product. Several models to explain the efficiency of the recovery are discussed.
Solvent-free copper/iron co-catalyzed N-arylation reactions of nitrogen-containing heterocycles with trimethoxysilanes in air
Song, Ren-Jie,Deng, Chen-Liang,Xie, Ye-Xiang,Li, Jin-Heng
, p. 7845 - 7848 (2007)
A solvent-free copper/iron-catalyzed N-arylation of nitrogen-containing heterocycles with trimethoxysilanes method for the formation of C-N bonds has been developed. In the presence of Cu, FeCl3, TBAF, and air, a variety of nitrogen-containing heterocycles including imidazoles and triazoles were coupled with aryltrimethoxysilanes and vinyltrimethoxysilane to afford the corresponding products in moderate to excellent yields. It is noteworthy that the reaction is conducted under solvent-free and relatively low Cu/FeCl3 loadings conditions.
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Shostakovskii,et al.
, (1969)
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Direct N- and C-vinylation with trimethoxyvinylsilane
Arsenyan, Pavel,Petrenko, Alla,Paegle, Edgars,Belyakov, Sergey
experimental part, p. 326 - 328 (2012/02/04)
Treatment of nucleobases, nucleosides, 5-membered N-heterocycles and terminal alkynes with trimethoxyvinylsilane in the presence of copper(II) acetate-TBAF system as catalyst affords the vinylation products.
METHOD OF PREPARING FLUORINATED ALKOXYTRIALKYLSILANES
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Page/Page column 11-12, (2008/06/13)
The present invention relates to a process for preparing alkoxytrialkylsilane, and in particular to a process, wherein an imidazole compound is added as a HCl scavenger and a reaction promoter, thereby enhancing the yield of fluorinated alkoxytrialkylsilanes and reducing corrosion problem.
