4-(2,4-dimethylphenyl)-2-ethoxy-6-trifluoromethyl-3,4-dihydro-2H-pyran | 1210825-88-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 4-(2,4-dimethylphenyl)-2-ethoxy-6-trifluoromethyl-3,4-dihydro-2H-pyran
• 英文别名: 4-(2,4-dimethylphenyl)-2-ethoxy-6-(trifluoromethyl)-3,4-dihydro-2H-pyran
• CAS: 1210825-88-9
• 化学式: C₁₆H₁₉F₃O₂
• 分子量: 300.321
• InChiKey: ZIAHGFGWJUWTFZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.6
• 重原子数：
  21
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  4-(2,4-dimethylphenyl)-2-ethoxy-6-trifluoromethyl-3,4-dihydro-2H-pyran 300.0 ℃ 、101.33 kPa 条件下， 反应 1.0h， 以68%的产率得到(E)-4-(2,4-dimethylphenyl)-1,1,1-trifluorobut-3-en-2-one
  参考文献：
  名称：

  A Facile Synthesis of 4-Aryl-1,1,1-trifluorobut-3-en-2-ones via 4-Aryl Substituted CF3 - Containing Dihydropyran Derivatives: A Versatile Method for the Introduction of Fluorine-Containing C4- and C6-Unit to Aromatic Compounds

  摘要：

  The CF3 - containing dihydropyran derivative (2) reacted easily with various aromatic compounds in trifluoroacetic acid to give novel 4-aryl substituted dihydropyran derivatives (7) in moderate to high yields. Retro hetero Die Is-Alder reaction of thus obtained 7 proceeded readily by heating at 300 degrees C to afford the corresponding 4-aryl-1,1,1-trifluorobut-3-en-2-ones (12) in good to excellent yields. With the use of p-toluenesulfonic acid instead of trifluoroacetic acid together with dihydropyran (2) in acetonitrile, 4-trifluoroacetyl-1,3-butalienylation of 1,3-dimethoxybenzene occurred successfully. The bimolecular reaction of dihydropyran (2) in the presence of p-toluenesulfonic acid was also examined.

  DOI：

  10.3987/com-09-s(s)60
• 作为产物：
  描述：

  2,4-Diethoxy-6-trifluoromethyl-3,4-dihydro-2H-pyran 、 间二甲苯 在 三氟乙酸 作用下， 反应 24.0h， 以53%的产率得到4-(2,4-dimethylphenyl)-2-ethoxy-6-trifluoromethyl-3,4-dihydro-2H-pyran
  参考文献：
  名称：

  A Facile Synthesis of 4-Aryl-1,1,1-trifluorobut-3-en-2-ones via 4-Aryl Substituted CF3 - Containing Dihydropyran Derivatives: A Versatile Method for the Introduction of Fluorine-Containing C4- and C6-Unit to Aromatic Compounds

  摘要：

  The CF3 - containing dihydropyran derivative (2) reacted easily with various aromatic compounds in trifluoroacetic acid to give novel 4-aryl substituted dihydropyran derivatives (7) in moderate to high yields. Retro hetero Die Is-Alder reaction of thus obtained 7 proceeded readily by heating at 300 degrees C to afford the corresponding 4-aryl-1,1,1-trifluorobut-3-en-2-ones (12) in good to excellent yields. With the use of p-toluenesulfonic acid instead of trifluoroacetic acid together with dihydropyran (2) in acetonitrile, 4-trifluoroacetyl-1,3-butalienylation of 1,3-dimethoxybenzene occurred successfully. The bimolecular reaction of dihydropyran (2) in the presence of p-toluenesulfonic acid was also examined.

  DOI：

  10.3987/com-09-s(s)60

文献信息

• A Facile Synthesis of 4-Aryl-1,1,1-trifluorobut-3-en-2-ones via 4-Aryl Substituted CF3 - Containing Dihydropyran Derivatives: A Versatile Method for the Introduction of Fluorine-Containing C4- and C6-Unit to Aromatic Compounds
  作者：Etsuji Okada、Norio Ota、Dai Shibata、Satoru Adachi、Shohei Saikawa

  DOI：10.3987/com-09-s(s)60

  日期：——

  The CF3 - containing dihydropyran derivative (2) reacted easily with various aromatic compounds in trifluoroacetic acid to give novel 4-aryl substituted dihydropyran derivatives (7) in moderate to high yields. Retro hetero Die Is-Alder reaction of thus obtained 7 proceeded readily by heating at 300 degrees C to afford the corresponding 4-aryl-1,1,1-trifluorobut-3-en-2-ones (12) in good to excellent yields. With the use of p-toluenesulfonic acid instead of trifluoroacetic acid together with dihydropyran (2) in acetonitrile, 4-trifluoroacetyl-1,3-butalienylation of 1,3-dimethoxybenzene occurred successfully. The bimolecular reaction of dihydropyran (2) in the presence of p-toluenesulfonic acid was also examined.