6-hydroxyluteolin 5,7,3'-trimethyl ether | 25782-21-2

• 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: 6-hydroxyluteolin 5,7,3'-trimethyl ether
• 英文别名: 6-Hydroxy-2-(4-hydroxy-3-methoxyphenyl)-5,7-dimethoxychromen-4-one
• CAS: 25782-21-2
• 化学式: C₁₈H₁₆O₇
• 分子量: 344.321
• InChiKey: NYBVFJUSYMRQJE-UHFFFAOYSA-N

物化性质

• 沸点：
  606.7±55.0 °C(Predicted)
• 密度：
  1.387±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  25
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.17
• 拓扑面积：
  94.4
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  6-hydroxyluteolin 5,7,3'-trimethyl ether 、 三氯化铝 生成 4’,5,6-trihydroxy-3’,7-dimethoxyflavone
  参考文献：
  名称：

  HORIE TOKUHARU, NIXON KAGAKU KAJSI, NIRRON KAGAKU KAISNI, J. CHEM. SOS. JAR., CHEM. AND I+

  摘要：

  DOI：

文献信息

• Studies of the selective O-alkylation and dealkylation of flavonoids. 13. An improved method for synthesizing 5,6,7-trihydroxyflavones from 6-hydroxy-5,7-dimethoxyflavones
  作者：Tokunaru Horie、Hideaki Tominaga、Yasuhiko Kawamura、Toshihide Yamada

  DOI：10.1021/jo00038a023

  日期：1992.6

  The demethylation of five 6-hydroxy-5,7-dimethoxyflavones 1 and their acetates with 30% w/v anhydrous aluminum chloride in acetonitrile was studied, and the following results were found. In the demethylation of 6-hydroxy-4',5,7-trimethoxyflavone (1a), 5,6-dihydroxy-4',7-dimethoxyflavone (2a) and 5,6,7-trihydroxy-4'-methoxyflavone (3a) were produced. Although the ratio of the two products varied according to the amount of aluminum chloride used, it became constant after 12-24 h because the cleavage of the 7-methoxy group in 2a was suppressed by iminoesterification of the 6-hydroxy group. In contrast, the demethylation of the 5- and 7-methoxy groups of acetate 4a proceeded smoothly by the process shown in Scheme II. The amount of 3a increased with increasing reaction time to give 3a as the main product after 36-48 h. The same phenomena were observed in the demethylation of the other 6-hydroxyflavones 1b-1e and their acetates 4b-4e. The demethylation of the acetates is widely applicable as a general method for synthesizing 5,6,7-trihydroxyflavones because the protection of hydroxy groups also suppresses the further cleavage of the methoxy group adjacent to the acetoxy group on the B ring of compounds such as 4d and 4e.
• HORIE TOKUHARU, NIXON KAGAKU KAJSI, NIRRON KAGAKU KAISNI, J. CHEM. SOS. JAR., CHEM. AND I+
  作者：HORIE TOKUHARU

  DOI：——

  日期：——