3-(4-chlorophenyl)-1-phenyl-5-(trifluoromethyl)pyrazole | 1024599-71-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 3-(4-chlorophenyl)-1-phenyl-5-(trifluoromethyl)pyrazole
• 英文别名: 3-(4-chlorophenyl)-5-(trifluoromethyl)-1-phenyl-1H-pyrazole；3-(4-chlorophenyl)-1-phenyl-5-(trifluoromethyl)-1H-pyrazole
• CAS: 1024599-71-0
• 化学式: C₁₆H₁₀ClF₃N₂
• 分子量: 322.717
• InChiKey: KEQQXFKXXHHANL-UHFFFAOYSA-N

物化性质

• 沸点：
  408.3±45.0 °C(Predicted)
• 密度：
  1.32±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.1
• 重原子数：
  22
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.06
• 拓扑面积：
  17.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  3-(4-chlorophenyl)-1-phenyl-5-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-5-ol 在 对甲苯磺酸 作用下， 以 二甲基亚砜 为溶剂， 反应 4.0h， 以278 mg的产率得到3-(4-chlorophenyl)-1-phenyl-5-(trifluoromethyl)pyrazole
  参考文献：
  名称：

  3-或5-CF 3-吡唑的选择性，无金属方法：CF 3-壬酮与肼的溶剂转换反应

  摘要：

  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。

  DOI：

  10.1021/acs.joc.7b00774

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。
• 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.
• Synergic Effects of Ionic Liquid and Microwave Irradiation in Promoting Trifluoromethylpyrazole Synthesis
  作者：Lilian Buriol、Clarissa P. Frizzo、Liziê D. T. Prola、Dayse N. Moreira、Mara R. B. Marzari、Elisandra Scapin、Nilo Zanatta、Helio G. Bonacorso、Marcos A. P. Martins

  DOI：10.1007/s10562-011-0571-9

  日期：2011.8

  The synthesis of 5-trifluoromethyl-1-phenyl-1H-pyrazoles from the reactions of 4-alkoxy-1,1,1-trifluoro-3-alken-2-ones [CF3C(O)CH=C(R-1)OR, where R = Me, Et; R-1 = H, Me, Bu, i-Bu, Ph, 4-MeC6H4, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-IC6H4, fur-2-yl] with phenyl hydrazine in the presence of ionic liquid [BMIM][BF4] is reported. Synergic effects of ionic liquid and microwave irradiation in promoting pyrazole synthesis have been shown for the first time.