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Vinylpyridine
Vinylpyridine may refer to: * 2-Vinylpyridine * 3-Vinylpyridine * 4-Vinylpyridine {{Short pages monitor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2-Vinylpyridine
2-Vinylpyridine is an organic compound with the formula CH2CHC5H4N. It is a derivative of pyridine with a vinyl group in the 2-position, next to the nitrogen. It is a colorless liquid, although samples are often brown. It is used industrially as a precursor to specialty polymers and as an intermediate in the chemical, pharmaceutical, dye, and photo industries. Vinylpyridine is sensitive to polymerization. It may be stabilized with a free radical inhibitor such as ''tert''-butylcatechol. Owing to its tendency to polymerize, samples are typically refrigerated. Synthesis It was first synthesized in 1887. A contemporary preparation entails condensation of 2-methylpyridine with formaldehyde, followed by dehydration of the intermediate alcohol. The reaction is carried out between 150–200 °C in an autoclave. The conversion is kept relatively low. After removal of unreacted 2-methylpyridine by distillation, concentrated aqueous sodium hydroxide is added to the residue and the res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |