1-(二氟甲基)-1H-咪唑 | 91459-68-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 1-(二氟甲基)-1H-咪唑
• 英文名称: 1-(difluoromethyl)-1H-imidazole
• 英文别名: 1-difluoromethyl-1H-imidazole；1-Difluoromethylimidazole；1-(difluoromethyl)imidazole
• CAS: 91459-68-6
• 化学式: C₄H₄F₂N₂
• 分子量: 118.086
• InChiKey: QQJXCDUJHKLIBD-UHFFFAOYSA-N

物化性质

• 沸点：
  62-63 °C(Press: 15 Torr)
• 密度：
  1.32±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 重原子数：
  8
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  17.8
• 氢给体数：
  0
• 氢受体数：
  3

安全信息

• 海关编码：
  2933290090

反应信息

• 作为反应物：
  描述：

  聚合甲醛 、 1-(二氟甲基)-1H-咪唑 以 水 为溶剂， 反应 24.0h， 以90%的产率得到(1-(difluoromethyl)-1H-imidazol-2-yl)methanol
  参考文献：
  名称：

  Multigram Synthesis of 1-(Difluoromethyl)imidazoles and -benzimidazoles

  摘要：

  一种用于咪唑和苯并咪唑二氟甲基化的便捷方法已经开发出来。该方法的关键特征是反应混合物中二氟甲基化试剂的逐渐生成，这是通过同时添加二氟氯甲烷和碱来实现的。该方法适用于官能化底物，并允许以百克级规模制备相应的1-(二氟甲基)咪唑和-苯并咪唑，收率可达60-95%。

  DOI：

  10.1055/s-0030-1258470
• 作为产物：
  描述：

  1-Bromodifluoromethylimidazole 在 水 、 锌 作用下， 以 甲醇 为溶剂， 反应 24.0h， 以95%的产率得到1-(二氟甲基)-1H-咪唑
  参考文献：
  名称：

  heteroarylium-的代Ñ -difluoromethylides和杂芳基- Ñ二氟甲基的阴离子以及它们与亲电子反应：杂芳基和heteroarylium- Ñ二氟甲基三甲基硅烷和新的杂芳基- Ñ -trifluoromethane

  摘要：

  N-溴二氟甲基-4-二甲基氨基吡啶溴化物，1-溴二氟甲基咪唑，1-甲基-3-溴二氟甲基咪唑鎓溴化物和1-溴二氟甲基-2-甲基苯并咪唑的还原脱溴反应使用四（二甲基氨基）乙烯（TDAE）或三（亚磷酸二乙基亚氨基酯可产生新的氟化碳负离子物质，即杂芳基-N-二氟甲基阴离子和杂芳基-N-二氟甲基阴离子。在亲电子试剂如苯甲醛，氯二苯基膦和氯三甲基硅烷的存在下，相应的杂芳基-和杂芳基-N-二氟甲基化的衍生物，咪唑-N-二氟甲基膦和-硅烷，2-甲基-苯并咪唑-N获得了-二氟甲基三甲基-羰基膦-膦和-硅烷。合成了类似的4-二甲基氨基吡啶鎓衍生物。

  DOI：

  10.1016/s0022-1139(01)00390-6

文献信息

• <i>N</i>-Difluoromethylation of Imidazoles and Benzimidazoles Using the Ruppert–Prakash Reagent under Neutral Conditions
  作者：G. K. Surya Prakash、Sankarganesh Krishnamoorthy、Somesh K. Ganesh、Aditya Kulkarni、Ralf Haiges、George A. Olah

  DOI：10.1021/ol403007j

  日期：2014.1.3

  using TMS-CF3 (the Ruppert–Prakash reagent) under neutral conditions. Difluoromethylated products were obtained in good-to-excellent yields. Inexpensive, commercially available starting materials, neutral conditions, and shorter reaction times are advantages of this methodology. Reactions are accessible through conventional as well as microwave irradiation conditions.

  使用TMS-CF 3（Ruppert-Prakash试剂）在中性条件下已实现了咪唑和苯并咪唑的直接N-二氟甲基化。以良好至优异的产率获得二氟甲基化产物。廉价的市售起始原料，中性条件和较短的反应时间是该方法的优点。可通过常规以及微波辐射条件进行反应。
• Reactions of some nitrogen heterocycles with chlorodifluoromethane under conditions of phase-transfer catalysis
  作者：Andrzej Jończyk、Ewelina Nawrot、Michał Kisielewski

  DOI：10.1016/j.jfluchem.2005.09.013

  日期：2005.12

  compounds containing one to four nitrogen atoms react with chlorodifluoromethane in the presence of concentrated aqueous sodium hydroxide and a catalyst, benzyltriethylammonium chloride (TEBAC) in dichloromethane or THF (phase-transfer catalysis, PTC) with formation of N-difluoromethyl substituted derivatives. The process takes place by reaction of N-anions from these heterocycles with difluorocarbene and

  在浓氢氧化钠水溶液和催化剂，苄基三乙基氯化铵（TEBAC）在二氯甲烷或THF中的存在下，含有1-4个氮原子的芳族杂环化合物与氯二氟甲烷反应（相转移催化，PTC），形成N-二氟甲基取代的衍生物。该过程通过来自这些杂环的N-阴离子与二氟卡宾的反应和由此形成的二氟甲基阴离子的质子化而发生。
• Use of fluoroform as a source of difluorocarbene in the synthesis of N -CF 2 H heterocycles and difluoromethoxypyridines
  作者：Charles S. Thomoson、Linhua Wang、William R. Dolbier

  DOI：10.1016/j.jfluchem.2014.08.015

  日期：2014.12

  Fluoroform is used as a source of difluorocarbene to convert various N-, O-, and C-nucleophiles to their difluoromethylated derivatives. Imidazole, benzimidazole, benztriazole, hydroxypyridines, and their derivatives underwent reaction at moderate temperatures and atmospheric pressure, using potassium hydroxide as base in a two-phase (water/acetonitrile) process to provide moderate to good yields of the respective products. Nitrophenols required addition of a co-solvent (methanol) to obtain good yields of products. (C) 2014 Elsevier B.V. All rights reserved.
• <i>N</i>-Tosyl-<i>S</i>-difluoromethyl-<i>S</i>-phenylsulfoximine: A New Difluoromethylation Reagent for S-, N-, and C-Nucleophiles
  作者：Wei Zhang、Fei Wang、Jinbo Hu

  DOI：10.1021/ol900567c

  日期：2009.5.21

  The first alpha-difluoromethyl sulfoximine compound, 2, was successfully prepared by using the copper(II)-catalyzed nitrene transfer reaction. Compound 2 was found to be a novel and efficient difluoromethylation reagent for transferring the CF2H group to S-, N-, and C-nucleophiles. Deuterium-labeling experiments suggest that a difluorocarbene mechanism is involved in the current difluoromethylation reactions.
• N-(polyfluoroalkyl)imidazolium-2-carbodithioates
  作者：L. M. Yagupol’skii、Yu. P. Kokhanovskii、K. I. Petko

  DOI：10.1134/s1070428010060217

  日期：2010.6

  Chemical properties of carbenes derived from 1-methyl-3-polyfluoroalkylimidazolium salts were studied. These unstable intermediate products reacted with carbon disulfide to give the corresponding imidazolium-2-carbodithioates which were subjected to methylation at the sulfur atom.