1,3,6-trimethoxyxanthene | 141247-90-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: 1,3,6-trimethoxyxanthene
• 英文别名: 1,3,6-trimethoxy-9H-xanthene
• CAS: 141247-90-7
• 化学式: C₁₆H₁₆O₄
• 分子量: 272.301
• InChiKey: RBZYGDAMPPXUPH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  36.9
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  1,3,6-trimethoxyxanthene 、 乙酰丙酮 在 manganese triacetate 作用下， 以 溶剂黄146 为溶剂， 反应 0.12h， 以29%的产率得到3-(1,3,6-Trimethoxy-9H-xanthen-9-yl)-pentane-2,4-dione
  参考文献：
  名称：

  Manganese(III)-mediated carbon-carbon bond formation in the reaction of xanthenes with active methylene compounds

  摘要：

  Oxidation of xanthenes with manganese(III) acetate in the presence of active methylene compounds such as 1,3-dicarbonyl compounds, malononitrile derivatives, acetone, and nitromethane selectively gives 9-substituted xanthene derivatives in good yields. A similar oxidation of thioxanthene also yields 2-(9-thioxanthenyl)-1,3-dicarbonyl compounds in 57-91% yields. The obtained 2-(9-xanthenyl)-1,3-dicarbonyl compounds are readily converted to 2-(9-xanthenylidene)-1,3-dicarbonyl derivatives using manganese(III) complexes or 2,3-dichloro-5, 6-dicyano-1,4-benzoquinone. The mechanisms for the formation of 9-substituted xanthenes are discussed on the basis of the reaction of intermediates, the electron-donating substituent effect on the xanthene ring system, effect of additives, and comparison with a reaction of radical-trapping reagents.

  DOI：

  10.1021/jo00039a010