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|Section2= |Section3= }} 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.〔Abe, Nobuyuki; Ichimura, Hisao; Kataoka, Toshiaki; Morishita, Sinji; Shimizu, Shinkichi; Shoji, Takayuki; Watanabe, Nanao. ''Ullmann's Encyclopedia of Industrial Chemistry'' 2007, p. 10-11〕 ==Synthesis== It was first synthesized in 1887. A contemporary preparation entails treatment of 2-methylpyridine with formaldehyde, followed by dehydration of the resulting intermediate alcohol. The reaction is carried out between 150–200 °C in an autoclave. The conversion must be kept relatively low with short reaction time to suppress the formation of byproducts. After removal of unreacted 2-methylpyridine by distillation, concentrated aqueous sodium hydroxide is added to the residue and the resultant mixture is distilled under reduced pressure. During distillation, the dehydration of 2-(2-pyridyl)ethanol occurs to give 2-vinylpyridine, which can be purified further by fractional distillation under reduced pressure in the presence of an inhibitor such as 4-tert-butylcatechol.〔 : An alternative synthesis involves the reaction of acrylonitrile and acetylene below 130–140 ̊C in the presence of organocobalt compounds as a catalyst.〔 Acrylonitrile is the solvent for the reaction.〔 : 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 stored between 3-4 °C. It is incompatible with strong oxidizing agents, strong bases, strong acids. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「2-Vinylpyridine」の詳細全文を読む スポンサード リンク
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