7-benzyloxy-5,8-dihydroxy-3-methoxy-2-(4-methoxy-phenyl)-chromen-4-one | 1570-11-2

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 黄酮类化合物
• 英文名称: 7-benzyloxy-5,8-dihydroxy-3-methoxy-2-(4-methoxy-phenyl)-chromen-4-one
• 英文别名: 7-Benzyloxy-5,8-dihydroxy-3-methoxy-2-(4-methoxy-phenyl)-chromen-4-on
• CAS: 1570-11-2
• 化学式: C₂₄H₂₀O₇
• 分子量: 420.419
• InChiKey: QPGSUEVAHDMBKX-UHFFFAOYSA-N

物化性质

• 熔点：
  186-187 °C
• 沸点：
  673.0±55.0 °C(predicted)
• 密度：
  1.42±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

反应信息

• 作为反应物：
  描述：

  7-benzyloxy-5,8-dihydroxy-3-methoxy-2-(4-methoxy-phenyl)-chromen-4-one 在 palladium on activated charcoal 氢气 作用下， 生成 5,7,8-Trihydroxy-3-methoxy-2-(4-methoxy-phenyl)-chromen-4-one
  参考文献：
  名称：

  13C NMR spectral assignment of the A-ring of polyoxygenated flavones

  摘要：

  The C-13 NMR spectra of polyhydroxyflavones were systematically examined by using about 70 examples which have a 4-methoxyphenyl B-ring, such as 5,6,7-, 5,7,8 and 5,6,8-trioxygenated and 5,6,7,8-tetraoxygenated flavones and flavonols, and the following results were obtained. In the C-13 NMR spectra of flavones, the signals at the 2-, 3- and 4-positions in the C-ring were hardly affected by the substituents on the A-ring except for those at the 5-position and shifted regularly by introduction of a methoxy or hydroxy group at the 3-position. The signals at the 5- to 10-positions in the A-ring were greatly affected by the substituents and oxygenated patterns on the A-ring and exhibited the respective characteristic pattern reflecting the A-ring substituents without the effects of the substituents on the B- and C-rings. The substituent effects on the A-ring were estimated from the spectral data. Consequently, it is found that the structures of polyhydroxyflavones can be correctly defined by their C-13 NMR spectral assignment. Additionally, we examined the structures of some natural flavones previously reported. (C) 1998 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0031-9422(97)00629-8
• 作为产物：
  描述：

  alkaline earth salt of/the/ methylsulfuric acid 在 吡啶 、 sodium hydroxide 、 dipotassium peroxodisulfate 作用下， 生成 7-benzyloxy-5,8-dihydroxy-3-methoxy-2-(4-methoxy-phenyl)-chromen-4-one
  参考文献：
  名称：

  Balakrishna; Seshadri, Proceedings - Indian Academy of Sciences, Section A, 1947, # 26, p. 214,218

  摘要：

  DOI：