trans-5-O-methyldihydroquercetin

• 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: trans-5-O-methyldihydroquercetin
• 英文别名: 5-O-Methyldihydroquercetin；(2R,3R)-2-(3,4-dihydroxyphenyl)-3,7-dihydroxy-5-methoxy-2,3-dihydrochromen-4-one
• 化学式: C₁₆H₁₄O₇
• 分子量: 318.283
• InChiKey: BACJQQZNSNNPKD-JKSUJKDBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  23
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  116
• 氢给体数：
  4
• 氢受体数：
  7

反应信息

• 作为产物：
  描述：

  trans-5-O-methyldihydroquercetin 7,3',4'-triacetate 在 sodium sulfite 作用下， 以 甲醇 为溶剂， 反应 16.0h， 生成 trans-5-O-methyldihydroquercetin
  参考文献：
  名称：

  Methylation of Dihydroquercetin Acetates:  Synthesis of 5-O-Methyldihydroquercetin

  摘要：

  The major products of methylation of dihydroquercetin (1, dhq) with diazomethane have been identified as 7-O-methyldhq (9), 7,3'-di-0-methyldhq (10), 7,4'-di-O-methyldhq (11), and 7,3',4'-tri-O-methyldhq (2). With dhq 3,7,3',4'-tetraacetate (6), dhq 3,5,3',4'-tetraacetate (5), dhq 3,3',4'-triacetate (7), dhq 7,3',4'triacetate (8), and dhq 3-acetate (4) the same reaction affords mainly 5-O-methyldhq 3,7,3',4'-tetraacetate (15), 7-O-methyldhq 3,5,3',4'-tetraacetate (13), 7-O-methyldhq 3,3',4'-triacetate (14), 5-O-methyldhq 7,3',4'triacetate (25), and 7-O-methyldhq 3-acetate (12), respectively. The methylation of 8 is accompanied by intermolecular acetyl migration from phenolic oxygen to the hydroxy group of the heterocyclic ring. 5-O-Methyldhq (28) is accessible by deacetylation of 25. 5,7-Di-O-methyldhq (29), four known methyl ethers, 13 new and three known methyl ether acetates of dhq, and six new isomers with 2,3-cis stereochemistry were spectroscopically identified.

  DOI：

  10.1021/np034005w

文献信息

• Methylation of Dihydroquercetin Acetates:  Synthesis of 5-<i>O</i>-Methyldihydroquercetin
  作者：Eberhard Kiehlmann、Peter W. Slade

  DOI：10.1021/np034005w

  日期：2003.12.1

  The major products of methylation of dihydroquercetin (1, dhq) with diazomethane have been identified as 7-O-methyldhq (9), 7,3'-di-0-methyldhq (10), 7,4'-di-O-methyldhq (11), and 7,3',4'-tri-O-methyldhq (2). With dhq 3,7,3',4'-tetraacetate (6), dhq 3,5,3',4'-tetraacetate (5), dhq 3,3',4'-triacetate (7), dhq 7,3',4'triacetate (8), and dhq 3-acetate (4) the same reaction affords mainly 5-O-methyldhq 3,7,3',4'-tetraacetate (15), 7-O-methyldhq 3,5,3',4'-tetraacetate (13), 7-O-methyldhq 3,3',4'-triacetate (14), 5-O-methyldhq 7,3',4'triacetate (25), and 7-O-methyldhq 3-acetate (12), respectively. The methylation of 8 is accompanied by intermolecular acetyl migration from phenolic oxygen to the hydroxy group of the heterocyclic ring. 5-O-Methyldhq (28) is accessible by deacetylation of 25. 5,7-Di-O-methyldhq (29), four known methyl ethers, 13 new and three known methyl ether acetates of dhq, and six new isomers with 2,3-cis stereochemistry were spectroscopically identified.

表征谱图