[1,1-bis-(4-chloro-phenyl)-2,2,2-trifluoro-ethoxy]-trimethylsilane

• 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: [1,1-bis-(4-chloro-phenyl)-2,2,2-trifluoro-ethoxy]-trimethylsilane
• 英文别名: [1,1-Bis(4-chlorophenyl)-2,2,2-trifluoroethoxy]-trimethylsilane
• 化学式: C₁₇H₁₇Cl₂F₃OSi
• 分子量: 393.308
• InChiKey: IMVITKXOTOOJMK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.65
• 重原子数：
  24
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  [1,1-bis-(4-chloro-phenyl)-2,2,2-trifluoro-ethoxy]-trimethylsilane 在 四丁基氟化铵 作用下， 以 四氢呋喃 为溶剂， 反应 1.0h， 以64%的产率得到1,1-二(4-氯苯基)-2,2,2-三氟乙醇
  参考文献：
  名称：

  在Superbase系统下，通过氟仿有机催化酮和磺酰氟的三氟甲基化反应。

  摘要：

  氟仿（HCF 3，HFC-23）是制造聚四氟乙烯（Teflon）的副产品。尽管具有吸引人的特性，但由于三氟甲基化的酸性低以及由HCF 3生成的裸露的三氟甲基碳负离子的不稳定性，为三氟甲基化驯服HCF 3还是很成问题。在这里，我们报道了HCF 3对酮和芳基磺酰氟进行有机超强碱催化的三氟甲基化。反应是通过使用新开发的“超碱有机催化剂体系”进行的，该体系由催化量的P 4 - t Bu和N（SiMe 3）3组成。在THF中有机催化条件下，一系列芳基和烷基酮以良好的收率转化为相应的α-三氟甲基甲醇。超碱有机催化体系也可以以高收率应用于芳基磺酰氟的三氟甲基化反应，从而获得重要的芳基三氟甲酸酯在THF或DMF中的生物学价值。质子化的P 4 -吨卜，H [P 4 -吨卜] +，建议将是用于催化方法的关键。使用HCF 3的这种新的催化方法有望扩大三氟甲基化的合成应用范围。

  DOI：

  10.1002/open.201500160
• 作为产物：
  描述：

  (三氟甲基)三甲基硅烷 、 4,4'-二氯二苯甲酮 在 tetra-n-butylammonium dimethyl phosphate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 1.0h， 以81%的产率得到[1,1-bis-(4-chloro-phenyl)-2,2,2-trifluoro-ethoxy]-trimethylsilane
  参考文献：
  名称：

  Facile Synthesis of TMS-Protected Trifluoromethylated Alcohols Using Trifluoromethyltrimethylsilane (TMSCF₃) and Various Nucleophilic Catalysts in DMF

  摘要：

  Organofluorine compounds are becoming increasingly important in different fields, such as material science, agro chemistry, and the pharmaceutical industry. Nucleophilic trifluoromethylation is one of the widely used methods to incorporate a trifluoromethyl moiety into organic molecules. We have carried out extensive studies to develop varieties of easily accessible nucleophilic catalysts to promote such reactions. TMS-protected trifluoromethylated alcohols were prepared from both aldehydes and ketones in excellent yields using catalytic amount of amine N-oxide. Carbonate and phosphate salts also showed efficient catalytic activity toward this reaction. These reactions were highly solvent dependent, and DMF was found to be the most suitable one among the various solvents studied. All these reactions proceeded under very mild conditions, giving clean products and avoiding the use of any fluoride initiators or expensive catalysts, and extremely water-free conditions. The mechanism for the reaction is discussed in detail. DFT calculations were performed on the possible reaction intermediates using the Gaussian 03 program at B3LYP/6-311+G* level to support the proposed mechanism.

  DOI：

  10.1021/jo060835d

文献信息

• Facile Synthesis of TMS-Protected Trifluoromethylated Alcohols Using Trifluoromethyltrimethylsilane (TMSCF₃) and Various Nucleophilic Catalysts in DMF
  作者：G. K. Surya Prakash、Chiradeep Panja、Habiba Vaghoo、Vijayalakshmi Surampudi、Roman Kultyshev、Mihirbaran Mandal、Golam Rasul、Thomas Mathew、George A. Olah

  DOI：10.1021/jo060835d

  日期：2006.9.1

  Organofluorine compounds are becoming increasingly important in different fields, such as material science, agro chemistry, and the pharmaceutical industry. Nucleophilic trifluoromethylation is one of the widely used methods to incorporate a trifluoromethyl moiety into organic molecules. We have carried out extensive studies to develop varieties of easily accessible nucleophilic catalysts to promote such reactions. TMS-protected trifluoromethylated alcohols were prepared from both aldehydes and ketones in excellent yields using catalytic amount of amine N-oxide. Carbonate and phosphate salts also showed efficient catalytic activity toward this reaction. These reactions were highly solvent dependent, and DMF was found to be the most suitable one among the various solvents studied. All these reactions proceeded under very mild conditions, giving clean products and avoiding the use of any fluoride initiators or expensive catalysts, and extremely water-free conditions. The mechanism for the reaction is discussed in detail. DFT calculations were performed on the possible reaction intermediates using the Gaussian 03 program at B3LYP/6-311+G* level to support the proposed mechanism.
• Organocatalyzed Trifluoromethylation of Ketones and Sulfonyl Fluorides by Fluoroform under a Superbase System
  作者：Satoshi Okusu、Kazuki Hirano、Etsuko Tokunaga、Norio Shibata

  DOI：10.1002/open.201500160

  日期：2015.10

  trifluoromethylation is quite problematic owing to its low acidity and the lability of the naked trifluoromethyl carbanion generated from HCF3. Herein we report the organic‐superbase‐catalyzed trifluoromethylation of ketones and arylsulfonyl fluorides by HCF3. The reactions were carried out by using a newly developed “superbase organocatalyst system” consisting of catalytic amounts of P4‐tBu and N(SiMe3)3

  氟仿（HCF 3，HFC-23）是制造聚四氟乙烯（Teflon）的副产品。尽管具有吸引人的特性，但由于三氟甲基化的酸性低以及由HCF 3生成的裸露的三氟甲基碳负离子的不稳定性，为三氟甲基化驯服HCF 3还是很成问题。在这里，我们报道了HCF 3对酮和芳基磺酰氟进行有机超强碱催化的三氟甲基化。反应是通过使用新开发的“超碱有机催化剂体系”进行的，该体系由催化量的P 4 - t Bu和N（SiMe 3）3组成。在THF中有机催化条件下，一系列芳基和烷基酮以良好的收率转化为相应的α-三氟甲基甲醇。超碱有机催化体系也可以以高收率应用于芳基磺酰氟的三氟甲基化反应，从而获得重要的芳基三氟甲酸酯在THF或DMF中的生物学价值。质子化的P 4 -吨卜，H [P 4 -吨卜] +，建议将是用于催化方法的关键。使用HCF 3的这种新的催化方法有望扩大三氟甲基化的合成应用范围。