25232-42-2Relevant articles and documents
Phosphine-Catalyzed Vinylation at Low Acetylene Pressure
Bienewald, Frank,Comba, Peter,Hashmi, A. Stephen K.,Menche, Maximilian,Rominger, Frank,Schafer, Ansgar,Schaub, Thomas,Sitte, Nikolai A.,Tuzina, Pavel
, p. 13041 - 13055 (2021/09/18)
The vinylation of various nucleophiles with acetylene at a maximum pressure of 1.5 bar is achieved by organocatalysis with easily accessible phosphines like tri-n-butylphosphine. A detailed mechanistic investigation by quantum-chemical and experimental methods supports a nucleophilic activation of acetylene by the phosphine catalyst. At 140 °C and typically 5 mol % catalyst loading, cyclic amides, oxazolidinones, ureas, unsaturated cyclic amines, and alcohols were successfully vinylated. Furthermore, the in situ generation of a vinyl phosphonium species can also be utilized in Wittig-type functionalization of aldehydes.
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.
Organoinorganic composites based on tetraethoxysilane and nitrogen polybases
Shaglaeva,Lebedeva,Pozhidaev,Sultangareev,Bochkareva,Es'Kova
, p. 335 - 338 (2008/02/06)
Hybrid organoinorganic composites insoluble in water and organic solvents were prepared by the hydrolysis of tetraethoxysilane in the presence of poly-1-vinylpyrazole, poly-1-vinylimidazole, and poly-4-vinylpyridine. The composition of the composites was determined by the nature of the polymeric nitrogen base and hydrolysis conditions. The composites synthesized showed high sorption activity in the extraction of the [PdCl4]2-, [PtCl6]2-, and [AuCl4]- ions from hydrochloric acid solutions. Nauka/Interperiodica 2007.
