39077-63-9Relevant academic research and scientific papers
Spectroscopic characterization of halogen- and cyano-substituted pyridinevinylenes synthesized without catalyst or solvent
Percino, M. Judith,Chapela, Victor M.,Montiel, Ling-Fa,Perez-Gutierrez, Enrique,Maldonado, J. Luis
, p. 360 - 367 (2010)
An efficient Knoevenagel route using green chemistry conditions was applied for the synthesis of halogen- and cyano- substituted pyridinevinylene compounds. Absorption and fluorescence emission spectra of these conjugated compounds were recorded and compared in order to evaluate the effect of substituents on the electronic properties of pyridinevinylene compounds. The substituents studied were terminal Cl and F, two or three aromatic rings, as well as a cyano group attached to a C=C double bond. The compounds synthesized are: (E)-2-(4-fluorostyryl)pyridine, (E)-2-(4-chlorostyryl)pyridine, (E)-4-(4-chlorostyryl)pyridine, 2,3-diphenylacrylonitrile, 3-phenyl-2-(pyridin-2-yl)acrylonitrile, 3-phenyl-2-(pyridin-3-yl)acrylonitrile, 2-phenyl-3-(pyridin-2-yl)acrylonitrile, 3,3′-(1,4-phenylene)bis(2-phenylacrylonitrile), 3,3′-(1,4-phenylene)bis(2-(pyridin-2-yl)acrylonitrile), and 3,3′-(1,4-phenylene)bis(2-(pyridin-3-yl)acrylonitrile). The solvent-free method used in this work allows obtaining each compound by controlling the reaction temperature. The compounds were characterized by infrared spectroscopy and 1H-NMR spectroscopy.
An aqueous phase synthesis of cyano substituted styrene compound method
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Paragraph 0053; 0054, (2016/12/16)
The invention discloses a method for aqueous-phase synthesizing cyan-substituted styrene compounds. The cyan-substituted styrene compounds are synthesized by taking water as a solvent and taking benzyl cyanide and aromatic aldehyde as materials through noevenagel condensation reaction, wherein the aromatic aldehyde is selected from formula shown in the specification. According to the invention, the reaction is carried out at a room temperature; relative to other high-temperature reactions in the prior art, not only is yield improved, but also energy resources are saved, and therefore, the method is beneficial to low-carbon harmless green engineering. White spherical precipitates are generated after reaction and dehydration, and the white spherical precipitates are washed in water to neutral, and dried to obtain a target product; and besides, the method is simple in synthetic steps, easy for treatment and high in yield.
