6-Methoxy-2-pentafluoroethyl-chromen-4-one | 380159-48-8

• 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: 6-Methoxy-2-pentafluoroethyl-chromen-4-one
• 英文别名: 6-methoxy-2-(pentafluoroethyl)-4H-chromen-4-one；6-methoxy-2-(1,1,2,2,2-pentafluoroethyl)chromen-4-one
• CAS: 380159-48-8
• 化学式: C₁₂H₇F₅O₃
• 分子量: 294.178
• InChiKey: PVPNXWVABJLOLO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  20
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  (三氟甲基)三甲基硅烷 、 6-Methoxy-2-pentafluoroethyl-chromen-4-one 在 四甲基氟化铵 作用下， 以 四氢呋喃 为溶剂， 反应 24.0h， 生成 (6-Methoxy-2-pentafluoroethyl-4-trifluoromethyl-4H-chromen-4-yloxy)-trimethyl-silane 、 (6-Methoxy-2-pentafluoroethyl-2-trifluoromethyl-2H-chromen-4-yloxy)-trimethyl-silane
  参考文献：
  名称：

  Regioselective Nucleophilic 1,4-Trifluoromethylation of 2-Polyfluoroalkylchromones with (Trifluoromethyl)trimethylsilane. Synthesis of Fluorinated Analogs of Natural 2,2-Dimethylchroman-4-ones and 2,2-Dimethylchromenes

  摘要：

  Reactions of 2-polyfluoroalkylchromones with (perfluoroalkyl)trimethylsilanes proceed as a 1,4-nucleophilic perfluoroalkylation to give 2,2-bis(polyfluoroalkyl)chroman-4-ones with high regioselectivity and good yields after acid hydrolysis. Oxidation of 6-methyl-2,2-bis(trifluoromethyl)chroman-4-one with a mixture of K2S2O8 and CuSO4 in aqueous acetonitrile leads to fluorinated analogues of natural lactarochromal and the corresponding acid. Reduction of substituted 2,2-bis(trifluoromethyl)chroman-4-one with sodium borohydride in methanol and subsequent dehydration of chromanols in refluxing xylene in the presence of p-toluene sulfonic acid gives 2,2-bis(trifluoromethyl)chromenes, which are fluorinated analogues of natural precocenes.

  DOI：

  10.1021/jo034591y

文献信息

• Regioselective Nucleophilic 1,4-Trifluoromethylation of 2-Polyfluoroalkylchromones with (Trifluoromethyl)trimethylsilane. Synthesis of Fluorinated Analogs of Natural 2,2-Dimethylchroman-4-ones and 2,2-Dimethylchromenes
  作者：Vyacheslav Ya. Sosnovskikh、Boris I. Usachev、Dmitri V. Sevenard、Gerd-Volker Röschenthaler

  DOI：10.1021/jo034591y

  日期：2003.10.1

  Reactions of 2-polyfluoroalkylchromones with (perfluoroalkyl)trimethylsilanes proceed as a 1,4-nucleophilic perfluoroalkylation to give 2,2-bis(polyfluoroalkyl)chroman-4-ones with high regioselectivity and good yields after acid hydrolysis. Oxidation of 6-methyl-2,2-bis(trifluoromethyl)chroman-4-one with a mixture of K2S2O8 and CuSO4 in aqueous acetonitrile leads to fluorinated analogues of natural lactarochromal and the corresponding acid. Reduction of substituted 2,2-bis(trifluoromethyl)chroman-4-one with sodium borohydride in methanol and subsequent dehydration of chromanols in refluxing xylene in the presence of p-toluene sulfonic acid gives 2,2-bis(trifluoromethyl)chromenes, which are fluorinated analogues of natural precocenes.