5-三氟甲基-3-(4-甲氧基苯基)-1-苯基吡唑 | 1024599-68-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 5-三氟甲基-3-(4-甲氧基苯基)-1-苯基吡唑
• 英文名称: 3-(4-methoxyphenyl)-1-phenyl-5-(trifluoromethyl)-1H-pyrazole
• 英文别名: 3-(4-Methoxyphenyl)-1-phenyl-5-(trifluoromethyl)pyrazole
• CAS: 1024599-68-5
• 化学式: C₁₇H₁₃F₃N₂O
• 分子量: 318.298
• InChiKey: UVVRFIRZOGDCRT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  23
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  27
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  苯肼 在 正丁基锂 、 溶剂黄146 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 2.83h， 生成 5-三氟甲基-3-(4-甲氧基苯基)-1-苯基吡唑
  参考文献：
  名称：

  通过二价阴离子环化有效地一锅合成5-全氟烷基吡唑†

  摘要：

  已经开发了一种高度选择性和有效的合成5-三氟甲基化和5-全氟烷基化吡唑的方法，该方法依赖于肼二价阴离子与全氟羧酸乙酯的环化。所制备的吡唑被评估为碱性磷酸酶的潜在抑制剂，即人体组织非特异性碱性磷酸酶（h-TNAP）和组织特异性肠道碱性磷酸酶（IAP）。大多数吡唑衍生物比h-TNAP更明显地抑制h-IAP，并且对核苷酸焦磷酸酶/磷酸二酯酶的影响较小。因此，该化合物显示为h-IAP的潜在选择性抑制剂。

  DOI：

  10.1039/c5ob01151e

文献信息

• Regioselective Synthesis of 5-Trifluoromethylpyrazoles by [3 + 2] Cycloaddition of Nitrile Imines and 2-Bromo-3,3,3-trifluoropropene
  作者：Hao Zeng、Xiaojie Fang、Zhiyi Yang、Chuanle Zhu、Huanfeng Jiang

  DOI：10.1021/acs.joc.0c02765

  日期：2021.2.5

  A general and practical method for the synthesis of 5-trifluoromethylpyrazoles is reported that occurs by the coupling of hydrazonyl chlorides with environmentally friendly and large-tonnage industrial feedstock 2-bromo-3,3,3-trifluoropropene (BTP). This exclusively regioselective [3 + 2] cycloaddition of nitrile imines and with BTP is catalyst-free and operationally simple and features mild conditions

  据报道，通过将酰氯与环境友好的大吨位工业原料2-溴-3,3,3-三氟丙烯（BTP）偶合，可以合成5-三氟甲基吡唑的通用方法。腈亚胺和BTP的这种唯一的区域选择性[3 + 2]环加成反应无催化剂，操作简单，具有温和的条件，高收率，可克级缩放，广泛的底物范围和有价值的官能团耐受性。重要的是，我们的方法已用于合成鞘氨醇1-磷酸受体活性激动剂的关键中间体。
• Selective, Metal-Free Approach to 3- or 5-CF₃-Pyrazoles: Solvent Switchable Reaction of CF₃-Ynones with Hydrazines
  作者：Vasiliy M. Muzalevskiy、Alexander Yu. Rulev、Alexey R. Romanov、Evgeniy V. Kondrashov、Igor A. Ushakov、Vyacheslav A. Chertkov、Valentine G. Nenajdenko

  DOI：10.1021/acs.joc.7b00774

  日期：2017.7.21

  A detailed study of the reaction of trifluoroacetylated acetylenes and aryl (alkyl) hydrazines was performed, aimed to the regioselective synthesis of 3- or 5-trifluoromethylated pyrazoles. It was found that the regioselectivity of reaction depends dramatically on the solvent nature. Highly polar protic solvents (hexafluoroisopropanol) favor the formation of 3-trifluoromethylpyrazoles. In contrast

  对三氟乙酰化乙炔与芳基（烷基）肼的反应进行了详细的研究，目的在于区域选择性合成3-或5-三氟甲基化的吡唑。发现反应的区域选择性极大地取决于溶剂性质。高极性质子溶剂（六氟异丙醇）有利于3-三氟甲基吡唑的形成。相反，当反应在极性非质子溶剂（DMSO）中进行时，优先观察到它们的5-CF 3-取代的异构体的形成。或者，3-CF 3的区域选择性组装取代的吡唑可以通过两步一锅法进行。在酸性催化剂存在下三氟甲基化的炔酮与芳基（烷基）肼的反应导致形成相应的。后者可以通过用碱处理平滑地转化为3-CF 3-吡唑。该溶剂可切换程序用于制备重要药物，如Celebrex和SC-560以及其以克为单位的异构体。讨论了可能的反应机理。
• Improved Regioselectivity in Pyrazole Formation through the Use of Fluorinated Alcohols as Solvents: Synthesis and Biological Activity of Fluorinated Tebufenpyrad Analogs
  作者：Santos Fustero、Raquel Román、Juan F. Sanz-Cervera、Antonio Simón-Fuentes、Ana C. Cuñat、Salvador Villanova、Marcelo Murguía

  DOI：10.1021/jo800251g

  日期：2008.5.1

  The preparation of N-methylpyrazoles is usually accomplished through reaction of a suitable 1,3-diketone with methylhydrazine in ethanol as the solvent. This strategy, however, leads to the formation of regioisomeric mixtures of N-methylpyrazoles, which sometimes are difficult to separate. We have determined that the use of fluorinated alcohols such as 2,2,2-trifluoroethanol (TFE) and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) as solvents dramatically increases the regioselectivity in the pyrazole formation, and we have used this modification in a straightforward synthesis of fluorinated analogs of Tebufenpyrad with acaricide activity.
• New strategy for the regioselective synthesis of 1-phenyl-3-trifluoromethyl-1H-pyrazoles
  作者：Nilo Zanatta、Simone S. Amaral、Josiane M. dos Santos、Andréia M.P.W. da Silva、Juliana M.F.M. Schneider、Liana da S. Fernandes、Helio G. Bonacorso、Marcos A.P. Martins

  DOI：10.1016/j.tetlet.2013.05.103

  日期：2013.7

  A regioselective synthesis of 3-trifluoromethyl-1-phenyl-1H-pyrazoles (1,3-isomers) as well as their 1,5-isomers (5-trifluoromethyl-1-phenyl-1H-pyrazoles), is described. The 1,3-isomers were obtained from the reaction of 4-alkoxy-1,1,1-trifluoroalk-3-en-2-ones with arylhydrazones followed by deprotective hydrolysis while the 1,5-isomer was obtained by direct cyclocondensation of 4-alkoxy-1,1,1-trifluoroalk-3-en-2-ones with phenylhydrazine. An unequivocal assignment of the 1,3- and 1,5-isomers of the pyrazole products is given. (C) 2013 Elsevier Ltd. All rights reserved.