trifluoromethyl-3-methyl-1H-isochromen-1-ol

• 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: trifluoromethyl-3-methyl-1H-isochromen-1-ol
• 英文别名: 1-trifluoromethyl-3-methyl-1H-isochromen-1-ol；3-Methyl-1-(trifluoromethyl)isochromen-1-ol；3-methyl-1-(trifluoromethyl)isochromen-1-ol
• 化学式: C₁₁H₉F₃O₂
• 分子量: 230.186
• InChiKey: PVVQWBFDIUXSTB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  16
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  29.5
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  trifluoromethyl-3-methyl-1H-isochromen-1-ol 在 cesium fluoride 作用下， 以 氘代氯仿 为溶剂， 生成 3-甲基异色烯-1-酮 、 三氟甲烷
  参考文献：
  名称：

  芳烃与三氟乙酰化 β-二酮的反应：异香豆素和菲的新形成

  摘要：

  AbstractPolysubstituted isocoumarins were synthesized by the reaction of substituted 2‐(trimethylsilyl)aryl triflates with trifluoromethylated β‐diketones in the presence of CsF. The reaction proceeded through carbon‐carbon bond insertion of aryne and intramolecular cyclization to form intermediates of alcohol anions, which extruded trifluoromethyl anion to afford isocoumarins. By using CuBr as a catalyst, 2 eq. of aryne reacted with β‐diketones to afford phenanthrenes and 1,2‐diarylethanones. Although reaction of 2‐(trimethylsilyl)phenyl triflate with 1,1,1‐trifluoro‐4′‐methylbenzoylacetone in the presence of CsF gave 3‐(4′‐methylphenyl)isocoumarin in 67% yield, addition of 0.2 eq. of CuCN resulted in the formation of 9‐(4‐methylbenzoyl)‐10‐trifluoromethylphenanthrene in 35% yield.

  DOI：

  10.1002/hc.21444
• 作为产物：
  描述：

  三氟乙酰丙酮 、 2-(三甲基硅)苯基三氟甲烷磺酸盐 在 cesium fluoride 作用下， 以 乙腈 为溶剂， 反应 12.0h， 以12%的产率得到trifluoromethyl-3-methyl-1H-isochromen-1-ol
  参考文献：
  名称：

  芳烃与三氟乙酰化 β-二酮的反应：异香豆素和菲的新形成

  摘要：

  AbstractPolysubstituted isocoumarins were synthesized by the reaction of substituted 2‐(trimethylsilyl)aryl triflates with trifluoromethylated β‐diketones in the presence of CsF. The reaction proceeded through carbon‐carbon bond insertion of aryne and intramolecular cyclization to form intermediates of alcohol anions, which extruded trifluoromethyl anion to afford isocoumarins. By using CuBr as a catalyst, 2 eq. of aryne reacted with β‐diketones to afford phenanthrenes and 1,2‐diarylethanones. Although reaction of 2‐(trimethylsilyl)phenyl triflate with 1,1,1‐trifluoro‐4′‐methylbenzoylacetone in the presence of CsF gave 3‐(4′‐methylphenyl)isocoumarin in 67% yield, addition of 0.2 eq. of CuCN resulted in the formation of 9‐(4‐methylbenzoyl)‐10‐trifluoromethylphenanthrene in 35% yield.

  DOI：

  10.1002/hc.21444

文献信息

• Novel One-pot Synthesis of Polysubstituted Isocoumarins from Arynes and Trifluoroacetylated β-Diketones
  作者：Kentaro Okuma、Koki Hirano、Yukiko Tanabe、Ryoichi Itoyama、Atsumi Miura、Noriyoshi Nagahora、Kosei Shioji

  DOI：10.1246/cl.131112

  日期：2014.4.5

  Polysubstituted isocoumarins such as thunberginol A were synthesized by the reaction of substituted 2-(trimethylsilyl)phenyl triflate with trifluoromethylated β-diketones in the presence of CsF. The reaction proceeded via carbon–carbon bond insertion of aryne followed by intramolecular cyclization and CF3 anion extrusion. The –C(···O)CF3 unit has high potential for not only the nucleophilic moiety but also a useful leaving group of CF3.

  多取代的异香豆素如Thunberginol A是通过在CsF存在下，将取代的2-(三甲基硅基)苯三氟甲磺酸酯与三氟甲基化的β-二酮反应合成的。该反应是通过芳基炔的碳-碳键插入，再进行分子内环化和CF3阴离子的挤出进行的。-C(···O)CF3单元不仅具有成为亲核基团的高潜力，还具有作为CF3有用离去基团的优点。
• Reaction of arynes with trifluoroacetylated β-diketones: Novel formation of isocoumarins and phenanthrenes
  作者：Kentaro Okuma、Yukiko Tanabe、Takuto Fukami、Yuto Ishibashi

  DOI：10.1002/hc.21444

  日期：2018.12

  AbstractPolysubstituted isocoumarins were synthesized by the reaction of substituted 2‐(trimethylsilyl)aryl triflates with trifluoromethylated β‐diketones in the presence of CsF. The reaction proceeded through carbon‐carbon bond insertion of aryne and intramolecular cyclization to form intermediates of alcohol anions, which extruded trifluoromethyl anion to afford isocoumarins. By using CuBr as a catalyst, 2 eq. of aryne reacted with β‐diketones to afford phenanthrenes and 1,2‐diarylethanones. Although reaction of 2‐(trimethylsilyl)phenyl triflate with 1,1,1‐trifluoro‐4′‐methylbenzoylacetone in the presence of CsF gave 3‐(4′‐methylphenyl)isocoumarin in 67% yield, addition of 0.2 eq. of CuCN resulted in the formation of 9‐(4‐methylbenzoyl)‐10‐trifluoromethylphenanthrene in 35% yield.