5,8-dihydroxy-7-methoxy-2-(4-methoxyphenyl)-4-benzopyrone | 89456-41-7

• 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: 5,8-dihydroxy-7-methoxy-2-(4-methoxyphenyl)-4-benzopyrone
• 英文别名: 5,8-dihydroxy-7,4’-dimethoxyflavone；5,8-dihydroxy-7,4′-dimethoxyflavone；5,8-dihydroxy-7,4'-dimethoxyflavone；7,4'-di-O-methylisoscutellarein；7,4′-di-o-methylisoscutellarein；5,8-dihydroxy-7-methoxy-2-(4-methoxy-phenyl)-chromen-4-one；5,8-dihydroxy-7-methoxy-2-(4-methoxyphenyl)chromen-4-one
• CAS: 89456-41-7
• 化学式: C₁₇H₁₄O₆
• 分子量: 314.295
• InChiKey: OVFDXRVXQRNNCT-UHFFFAOYSA-N

物化性质

• 熔点：
  265-267 °C(Solv: ethyl acetate (141-78-6))
• 沸点：
  568.4±50.0 °C(Predicted)
• 密度：
  1.402±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  23
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  85.2
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  5,8-dihydroxy-7-methoxy-2-(4-methoxyphenyl)-4-benzopyrone 、 硫酸二甲酯 在 potassium carbonate 、 丙酮 作用下， 生成 4',5,7,8-四甲氧基黄酮
  参考文献：
  名称：

  Rao et al., Proceedings - Indian Academy of Sciences, Section A, 1949, # 29, p. 72,75

  摘要：

  DOI：
• 作为产物：
  描述：

  5-羟基-4',7-二甲氧基黄酮 在 二甲基二环氧乙烷 作用下， 以 二氯甲烷 、 丙酮 为溶剂， 反应 2.0h， 以89%的产率得到5,8-dihydroxy-7-methoxy-2-(4-methoxyphenyl)-4-benzopyrone
  参考文献：
  名称：

  Regioselective hydroxylation of 2-hydroxychalcones by dimethyldioxirane towards polymethoxylated flavonoids

  摘要：

  The flavone nucleus is part of a large number of natural products and medicinal compounds. In this presentation the novel regioselective hydroxylation of hydroxyarenes with DMD is described. The results showed further that flavonoids with 5-hydroxy group were selectively oxyfunctionalized at the para-position C8 carbon atom by DMD. Finally, according to this methodology, the naturally occurring isosinensetin, tangeretin, sinensetin, nobiletin, natsudaidain, gardenin B, 3,3',4',5,6,7,8-heptamethoxyflavone, quercetin and its derivatives were synthesized. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2004.01.023

文献信息

• O-methylation of flavonoids by cell-free extracts of calamondin orange
  作者：Gunter Brunet、Ragai K. Ibrahim

  DOI：10.1016/0031-9422(80)85102-8

  日期：——

  hydroxyls of a number of flavonoids, indicating the existence in citrus tissues of ortho, meta, para and 3-O-methyltransferases. The latter, hitherto unreported enzyme, catalysed the formation of 3-O-methyl ethers of galangin and quercetin. The stepwise O-methylation of a number of compounds, especially quercetin and quercetagetin, tends to suggest a coordinated sequence of O-methylations on the surface

  摘要 柑桔（Citrus mitis）的无细胞提取物催化了许多类黄酮的几乎所有羟基的O-甲基化，表明柑橘组织中存在邻位、间位、对位和3-O-甲基转移酶。后者，迄今未报道的酶，催化高良姜素和槲皮素的 3-O-甲基醚的形成。许多化合物的逐步 O-甲基化，尤其是槲皮素和槲皮素，往往表明多酶复合物表面上存在协调的 O-甲基化序列。所使用的类黄酮底物的甲基受体能力与它们的羟基取代模式和它们的负电子密度分布有关。
• Studies of the Selective<i>O</i>-Alkylation and Dealkylation of Flavonoids. VI. Demethylation of 8-Hydroxy-5,7-dimethoxyflavones with Anhydrous Aluminum Chloride or Bromide in Acetonitrile
  作者：Tokunaru Horie、Hiroki Kourai、Nobuhisa Fujita

  DOI：10.1246/bcsj.56.3773

  日期：1983.12

  with anhydrous aluminum chloride or bromide in acetonitrile was studied and the following results were obtained. (1) Anhydrous aluminum chloride in acetonitrile selectively split the 5-methoxyl group without cleavage of the 7-methoxyl group, and seven 5,8-dihydroxy-7-methoxy-flavones were quantitatively synthesized by the demethylation. (2) In the demethylation with anhydrous aluminum bromide, the

  研究了七种 8-羟基-5,7-二甲氧基黄酮与无水氯化铝或溴化铝在乙腈中的脱甲基反应，得到以下结果。(1)无水氯化铝在乙腈中选择性裂解5-甲氧基而不裂解7-甲氧基，通过脱甲基作用定量合成7个5,8-二羟基-7-甲氧基-黄酮。(2) 在无水溴化铝脱甲基反应中，4',5,7-三甲氧基-和3',4',5,7-四甲氧基-8-羟基黄酮上的5-和7-甲氧基被选择性裂解得到相应的5,7,8-三羟基黄酮收率良好。然而，去甲基化不能用于合成 5,7,8-trihydroxy-3',4',5'-trimethoxyflavone, 4',5,7,8-tetrahydroxy-3'-methoxy-, 和 3' ,5,7,8-四羟基-4'-甲氧基黄酮，因为 B 环上的甲氧基裂解。合成的黄酮被用于鉴定两种天然黄酮，它们被认为是4',5,8-tri...