5,7,3'-trihydroxy-3,6,8,4'-tetramethoxyflavone

• 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: 5,7,3'-trihydroxy-3,6,8,4'-tetramethoxyflavone
• 英文别名: 5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-3,6,8-trimethoxychromen-4-one
• 化学式: C₁₉H₁₈O₉
• 分子量: 390.347
• InChiKey: HUCUBQBJTIMKKN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  28
• 可旋转键数：
  5
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.21
• 拓扑面积：
  124
• 氢给体数：
  3
• 氢受体数：
  9

反应信息

• 作为产物：
  描述：

  7-Benzyloxy-2-(3-benzyloxy-4-methoxy-phenyl)-3-hydroxy-5,6,8-trimethoxy-chromen-4-one 在 palladium on activated charcoal aluminum tri-bromide 、 氢气 、 potassium carbonate 作用下， 以 甲醇 、 乙酸乙酯 、 丙酮 、 乙腈 为溶剂， 反应 2.83h， 生成 5,7,3'-trihydroxy-3,6,8,4'-tetramethoxyflavone
  参考文献：
  名称：

  Studies of the SelectiveO-Alkylation and Dealkylation of Flavonoids. XXI. A Convenient Method for Synthesizing 3,5,7-Trihydroxy-6,8-dimethoxyflavones and 5,7-Dihydroxy-3,6,8-trimethoxyflavones

  摘要：

  研究了三氟化硼的 Friedel-Crafts 乙酰化反应，发现在乙酸酐和乙酸的混合物中，可以方便地从 2,3,5,6- 四甲氧基苯基乙酸酯合成 1-(2,4-二羟基-3,5,6-三甲氧基苯基)乙酮。1-[2-羟基-3,5,6-三甲氧基-4-（甲氧基甲氧基）苯基]乙酮通过贝克-文卡塔拉曼转化环化成 7-羟基-5,6,8-三甲氧基黄酮。黄酮的 7-苄基醚被二甲基二氧环己烷氧化，然后用少量对甲苯磺酸处理，得到 7-苄氧基-3-羟基-5,6,8-三甲氧基黄酮，并将其转化为甲醚和对甲苯磺酸盐。在温和的条件下，用无水溴化铝在乙腈中选择性地裂解甲醚或对甲苯磺酸盐中的 5-甲氧基，得到相应的 5-羟基黄酮，而后一种带有 3-对甲苯磺酸盐基团的化合物在甲醇中用碳酸钾水解，顺利地转化为 3,5-二羟基黄酮。通过氢解 7-苄氧基-3,5-二羟基黄酮及其 3-甲基醚，可定量得到 3,5,7-三羟基-6,8-二甲氧基黄酮及其 3-甲基醚。该方法适用于合成 3,5,7-三羟基-6,8-二甲氧基黄酮及其 3-甲基醚，合成的六种黄酮的 1H 和 13C NMR、MS 和 UV 光谱特性得到了澄清。

  DOI：

  10.1246/bcsj.69.1033

文献信息

• Semisynthesis of Natural Flavones Inhibiting Tubulin Polymerization, from Hesperidin
  作者：Guy Lewin、Alexandre Maciuk、Sylviane Thoret、Geneviève Aubert、Joëlle Dubois、Thierry Cresteil

  DOI：10.1021/np100065v

  日期：2010.4.23

  Semisynthesis of 5,3'-dihydroxy-3,6,7,8,4'-pentamethoxyflavone (1), a natural flavone that binds with high affinity to tubulin, was performed from hesperidin, the very abundant Citrus flavanone, by a five-step sequence. The last step of the synthesis also gave rise to 5,3'-dihydroxy-3,6,7,4'-tetramethoxyflavone (= casticin or vitexicarpin) (10), 5,3'-dihydroxy-3,7,8,4'-tetramethoxyflavone (= gossypetin 3,7,8,4'-tetramethyl ether) (11), and, unexpectedly, 5,7,3'-trihydroxy-3,6,8,4'tetramethoxyflavone (12) and 5,3'-dihydroxy-8-dimethylamino-3,6,7,4'-tetramethoxyflavone (= 8-dimethylaminocasticin) (13). Cytotoxicity and antitubulin activity of these five flavones, as well as 5,3'-dihydroxy-3,7,4'-trimethoxyflavone (= ayanin) (14) and intermediate 6,8-dibromo-ayanin (8), were evaluated. Comparison of the responses confirmed and clarified the influence of the A-ring substitution pattern on the biological activity.
• Studies of the Selective<i>O</i>-Alkylation and Dealkylation of Flavonoids. XXI. A Convenient Method for Synthesizing 3,5,7-Trihydroxy-6,8-dimethoxyflavones and 5,7-Dihydroxy-3,6,8-trimethoxyflavones
  作者：Tokunaru Horie、Takeshi Kitou、Yasuhiko Kawamura、Kazuyo Yamashita

  DOI：10.1246/bcsj.69.1033

  日期：1996.4

  The Friedel–Crafts acetylation with boron trifluoride was studied and it was found that 1-(2,4-dihydroxy-3,5,6-trimethoxyphenyl)ethanone was conveniently synthesized from 2,3,5,6-tetramethoxyphenyl acetate in a mixture of acetic anhydride and acetic acid. 1-[2-Hydroxy-3,5,6-trimethoxy-4-(methoxymethoxy)phenyl]ethanone was cyclized to 7-hydroxy-5,6,8-trimethoxyflavone by using the Baker–Venkataraman transformation. The 7-benzyl ether of the flavone was oxidized with dimethyldioxirane and then treated with a small amount of p-toluenesulfonic acid to give 7-benzyloxy-3-hydroxy-5,6,8-trimethoxyflavone, which was converted into the methyl ether and tosylate. The 5-methoxy group in the methyl ether or tosylate was selectively cleaved with anhydrous aluminum bromide in acetonitrile under mild conditions to give the corresponding 5-hydroxyflavones and the latter compound with a 3-tosyloxy group was smoothly converted into the 3,5-dihydroxyflavone by hydrolysis with potassium carbonate in methanol. The hydrogenolysis of the 7-benzyloxy-3,5-dihydroxyflavone and its 3-methyl ether afforded quantitatively 3,5,7-trihydroxy-6,8-dimethoxyflavone and its 3-methyl ether. The process was suitable as a general method for synthesizing 3,5,7-trihydroxy-6,8-dimethoxyflavones and their 3-methyl ethers and the six flavones were synthesized for the clarification of their 1H and 13C NMR, MS, and UV spectral properties.

  研究了三氟化硼的 Friedel-Crafts 乙酰化反应，发现在乙酸酐和乙酸的混合物中，可以方便地从 2,3,5,6- 四甲氧基苯基乙酸酯合成 1-(2,4-二羟基-3,5,6-三甲氧基苯基)乙酮。1-[2-羟基-3,5,6-三甲氧基-4-（甲氧基甲氧基）苯基]乙酮通过贝克-文卡塔拉曼转化环化成 7-羟基-5,6,8-三甲氧基黄酮。黄酮的 7-苄基醚被二甲基二氧环己烷氧化，然后用少量对甲苯磺酸处理，得到 7-苄氧基-3-羟基-5,6,8-三甲氧基黄酮，并将其转化为甲醚和对甲苯磺酸盐。在温和的条件下，用无水溴化铝在乙腈中选择性地裂解甲醚或对甲苯磺酸盐中的 5-甲氧基，得到相应的 5-羟基黄酮，而后一种带有 3-对甲苯磺酸盐基团的化合物在甲醇中用碳酸钾水解，顺利地转化为 3,5-二羟基黄酮。通过氢解 7-苄氧基-3,5-二羟基黄酮及其 3-甲基醚，可定量得到 3,5,7-三羟基-6,8-二甲氧基黄酮及其 3-甲基醚。该方法适用于合成 3,5,7-三羟基-6,8-二甲氧基黄酮及其 3-甲基醚，合成的六种黄酮的 1H 和 13C NMR、MS 和 UV 光谱特性得到了澄清。