4-(biphenyl-4-yl)-1-methyl-1H-pyrazole | 1570098-29-1

• 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: 4-(biphenyl-4-yl)-1-methyl-1H-pyrazole
• 英文别名: 1-Methyl-4-(4-phenylphenyl)pyrazole
• CAS: 1570098-29-1
• 化学式: C₁₆H₁₄N₂
• 分子量: 234.301
• InChiKey: PDOJFDSCWIROHD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  18
• 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：
  1

反应信息

• 作为产物：
  描述：

  1-甲基-4-碘-吡唑 、 4-联苯硼酸 在 四(三苯基膦)钯 、 caesium carbonate 作用下， 以 乙二醇二甲醚 、 水 为溶剂， 反应 0.08h， 以95%的产率得到4-(biphenyl-4-yl)-1-methyl-1H-pyrazole
  参考文献：
  名称：

  Efficient synthesis of 4-substituted pyrazole via microwave-promoted Suzuki cross-coupling reaction

  摘要：

  Pyrazoles and their derivatives are important heterocycles found in nature and present in numerous bioactive compounds. In contrast to 3 or 5-aryl pyrazole, the preparation of 4-aryl pyrazole is fairly rare. Utilizing microwave irradiation, the synthesis of 4-substituted-arylpyrazole via Suzuki cross-coupling has been developed with a wide range of substrates. The remarkable advantages of this method are mild reaction conditions, simple operation, high yield, and short reaction time. Product structures were identified by MS, H-1 NMR, C-13 NMR, and elemental analysis. (C) 2014 Qiong-You Wu and Guang-Fu Yang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

  DOI：

  10.1016/j.cclet.2014.03.013

文献信息

• Palladium-catalysed direct diarylations of pyrazoles with aryl bromides: a one step access to 4,5-diarylpyrazoles
  作者：Abdelilah Takfaoui、Liqin Zhao、Rachid Touzani、Pierre H. Dixneuf、Henri Doucet

  DOI：10.1016/j.tetlet.2014.01.079

  日期：2014.3

  The palladium-catalysed direct arylation of pyrazoles with aryl halides, using PdCl(C3H5)(dppb)/KOAc catalyst, reveals a similar reactivity of C4 and C5 CH bonds of pyrazoles, whereas the C3 CH bond is almost unreactive, and gives access in one step to a variety of 4,5-diarylpyrazoles. This CH bond functionalisation reaction tolerates a variety of substituents on the aryl bromide such as nitro, cyano

  使用PdCl（C 3 H 5）（dppb）/ KOAc催化剂，钯催化吡唑与芳基卤化物的直接芳基化反应显示出吡唑的C4和C5 C H键具有相似的反应性，而C3 C H键几乎不具有反应性，并一步一步即可获得各种4,5-二芳基吡唑类化合物。该C H键官能化反应容许芳基溴化物上的各种取代基，例如硝基，氰基，甲酰基，丙酰基，酯，氯，氟或三氟甲基。