20173-98-2Relevant articles and documents
Phosphine-Catalyzed Vinylation at Low Acetylene Pressure
Sitte, Nikolai A.,Menche, Maximilian,Tu?ina, Pavel,Bienewald, Frank,Sch?fer, Ansgar,Comba, Peter,Rominger, Frank,Hashmi, A. Stephen K.,Schaub, Thomas
, 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.
N-vinylpyrazole copolymers
Lebedeva,Pozhidaev,Shaglaeva,Bochkareva,Es'kova
scheme or table, p. 128 - 132 (2011/06/09)
Copolymers of N-vinylpyrazole with N-vinyl-4,5,6,7-tetrahydroindole and vinyl acetate were prepared by radical copolymerization. The composition, structure, and properties of the copolymers were studied. The reactivity constants of the monomers were calculated. Copolymer films were prepared from solutions by casting, and the proton conductivity of the films was determined.
Synthesis of N-vinylpyrazoles
Attarian,Matsoyan,Martirosyan
, p. 452 - 455 (2007/10/03)
A method is proposed for the alkylation of pyrazoles with dichloroethane in water in the presence of the phase-transfer catalyst benzyltriethylammonium chloride (TEBAC). It was shown that dehydrochlorination of the corresponding N-(β-chloroethyl)pyrazoles in water under conditions of phase-transfer catalysis proceeds smoothly with the formation of N-vinylpyrazoles in 80-90% yield. 2005 Springer Science+Business Media, Inc.
