| 391671-57-1

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 香豆素及其衍生物
• CAS: 391671-57-1
• 化学式: C₂₀H₁₃ClN₂O₅
• 分子量: 396.787
• InChiKey: FNHJWRIBEZDNKS-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  (8E)-8-[(4-chlorophenyl)hydrazinylidene]-4-methylfuro[2,3-h]chromene-2,9-dione 、 乙酸酐 在 吡啶 作用下， 生成
  参考文献：
  名称：

  Electronic structure of π-systems. Studies of electronic structures and tautomeric transformations of a series of 4-methyl-8-(R-phenylazo)dihydrofuro[2,3-h]coumarin-9-ones

  摘要：

  Tautomeric transformations of a series of 4-methyl-8-(R-phenylazo)dihydrofuro[2,3-h]-coumarin-9-ones were studied by 1H NMR, IR, electronic absorption spectroscopy, mass spectrometry, and quantum chemistry methods. The obtained results suggest that (p-R-phenyl)-derivatives exist in the quinone hydrazone form, while (o-R-phenyl)derivatives exist as a mixture of quinone hydrazone and azo enol tautomers with domination of the former. The anti-quinone hydrazone tautomers with a strong intramolecular hydrogen bond are more favorable than the syn-quinone hydrazone tautomers.

  DOI：

  10.1007/s11172-010-0190-4