2-(cyclohexyloxymethyl)benzo[b]thiophene | 1327239-04-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并噻吩类
• 英文名称: 2-(cyclohexyloxymethyl)benzo[b]thiophene
• CAS: 1327239-04-2
• 化学式: C₁₅H₁₈OS
• 分子量: 246.373
• InChiKey: BXBZVCDOGCTOTH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.75
• 重原子数：
  17.0
• 可旋转键数：
  3.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  9.23
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为产物：
  描述：

  (methoxymethoxy)cyclohexane 在 三氟化硼乙醚 作用下， 以 二氯甲烷 为溶剂， 反应 0.58h， 生成 2-(cyclohexyloxymethyl)benzo[b]thiophene
  参考文献：
  名称：

  Expanded Substrate Scope and Improved Reactivity of Ether-Forming Cross-Coupling Reactions of Organotrifluoroborates and Acetals

  摘要：

  Mixed acetals and organotrifluoroborates undergo BF3 center dot OEt2-promoted cross-couplings to give dialkyl ethers under simple, mild conditions. A survey of reaction partners identified a hydroxamate leaving group that improves the regioselectivity and product yield in the BF3 center dot OEt2-promoted coupling reaction of mixed acetals and potassium alkynyl-, alkenyl-, aryl- and heteroaryltrifluoroborates to access substituted dialkyl ethers. This leaving group enables the reaction to proceed rapidly under mild conditions (0 degrees C, 5-60 min) and permits reactions with electron-deficient potassium aryltrifluoroborates that are less reactive with other acetal substrates. A study of the reaction mechanism and characterization of key intermediates by NMR spectroscopy and X-ray crystallography identified a role for the hydroxamate moiety as a reversible leaving group that serves to stabilize the key oxocarbenium intermediate and the need for a slight excess of organodifluoroborane to serve as a catalyst. A secondary role for the boron nucleophile as an activating ligand was also considered. These studies provide the basis for a general class of reagents that lead to dialkyl ethers by a simple, predictable cross-coupling reaction.

  DOI：

  10.1021/ja205174c