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2-羟基吡啶

2-羟基吡啶
2-Pyridone
2-Pyridone molecule (lactam form)
2-Pyridone molecule (lactim form)
IUPAC名
Pyridin-2(1H)-one
别名 2-吡啶酮
识别
CAS号 142-08-5  checkY
ChemSpider 8537
SMILES
 
  • Oc1ccccn1
InChI
 
  • 1/C5H5NO/c7-5-2-1-3-6-4-5/h1-4,7H
InChIKey GRFNBEZIAWKNCO-UHFFFAOYAT
ChEBI 16540
RTECS UV1144050
性质
化学式 C5H5NO
摩尔质量 95.1 g·mol−1
外观 无色晶体
密度 1.39 g/cm³
熔点 107.8 °C(381 K)
沸点 280 °C(553 K)
溶解性(其它溶剂) 可溶于甲醇丙酮
pKa 11.65
λmax 293 nm (ε 5900, H2O soln) nm
结构
晶体结构 正交晶系
分子构型 planar
偶极矩 4.26 D
危险性
警示术语 R:R36 R37 R38
安全术语 S:S26 S37/39
主要危害 刺激性
NFPA 704
1
2
0
 
相关物质
相关化学品 吡啶
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

2-羟基吡啶2-吡啶酮是一种有机化合物,化学式为C5H4NOH,为无色结晶,可用于的合成。它可形成与RNADNA中发现的碱基配对机制有相关的氢键结构。它是以互变异构体形式存在的典型分子。

合成

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2-羟基吡啶(2-吡啶酮)可通过环化反应制备,并通过与氨的交换反应而得到:

2-Pyridone synthesis from 2-pyran

吡啶与一些氧化剂(如过氧化氢)反应形成N-氧化物。该吡啶-N-氧化物在乙酸酐中进行重排反应,得到2-羟基吡啶:

2-Pyridone synthesis from pyridine-N-oxide

Guareschi-Thorpe缩合反应中,氰乙酰胺1,3-二酮反应,得到与2-羟基吡啶。[1][2]该反应以Icilio Guareschi和Jocelyn Field Thorpe命名。[3][4]

参考文献

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  1. ^ Gilchrist, T.L. (1997). Heterocyclic Chemistry ISBN 0-470-20481-8
  2. ^ Rybakov V. R.; Bush A. A.; Babaev E. B.; Aslanov L. A. 3-Cyano-4,6-dimethyl-2-pyridone (Guareschi Pyridone). Acta Crystallogr E. 2004, 6 (2): o160–o161. doi:10.1107/S1600536803029295. 
  3. ^ I. Guareschi. Mem. Reale Accad. Sci. Torino II. 1896,. 46, 7, 11, 25.  缺少或|title=为空 (帮助)
  4. ^ Baron, H.; Remfry, F. G. P.; Thorpe, J. F. CLXXV.-The formation and reactions of imino-compounds. Part I. Condensation of ethyl cyanoacetate with its sodium derivative. J. Chem. Soc., Trans. 1904, 85: 1726–1761. 
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2-羟基吡啶
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