2,4-dimethyl-5-(pyridin-3-yl)thiazole | 1267180-21-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 2,4-dimethyl-5-(pyridin-3-yl)thiazole
• 英文别名: 2,4-Dimethyl-5-pyridin-3-yl-1,3-thiazole；2,4-dimethyl-5-pyridin-3-yl-1,3-thiazole
• CAS: 1267180-21-1
• 化学式: C₁₀H₁₀N₂S
• 分子量: 190.269
• InChiKey: LLEOTOBNGJNQJZ-UHFFFAOYSA-N

物化性质

• 沸点：
  311.7±27.0 °C(predicted)
• 密度：
  1.165±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  54
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  3-溴吡啶 、 2,4-二甲基噻唑 在 C₃₄H₄₈Cl₂N₂Pd 、 potassium carbonate 、 三甲基乙酸 作用下， 以 N,N-二甲基乙酰胺 为溶剂， 反应 8.0h， 以65%的产率得到2,4-dimethyl-5-(pyridin-3-yl)thiazole
  参考文献：
  名称：

  基于Camphyl的α-二亚胺钯络合物：露天中噻唑直接芳基化的高效预催化剂

  摘要：

  基于开发无膦钯催化的直接CHH芳基化的策略，合成并表征了一系列基于迷迭香的带有空间庞大取代基的α-二亚胺钯配合物。钯配合物用于噻唑衍生物与芳基溴化物的交叉偶联。筛选了体积庞大的取代基对N-芳基部分的影响以及反应条件。在最佳方案下，在露天条件下，在钯含量为0.2 mol％的情况下，可以将宽范围的芳基溴化物与噻唑平稳地偶联，并获得良好或优异的收率。

  DOI：

  10.1039/c7ob00856b

文献信息

• Bulky α-diimine palladium complexes: highly efficient for direct C–H bond arylation of heteroarenes under aerobic conditions
  作者：Jia-Sheng Ouyang、Yan-Fang Li、Dong-Sheng Shen、Zhuofeng Ke、Feng-Shou Liu

  DOI：10.1039/c6dt02544g

  日期：——

  bidentate N,N-palladium complex C3 with both a backbone and N-aryl bulkiness was found to be a highly efficient precatalyst under aerobic conditions. With a low palladium loading of 0.5–0.1 mol%, a variety of heteroarenes with challenging bulky steric aryl bromides as well as heteroaryl bromides are all applicable for this cross-coupling reaction.

  通过增强主链和N-芳基部分的体积的策略，我们设计并合成了一种体积较大的α-二亚胺钯配合物（即[Ar–N C（R）–C（R）N– Ar] PdCl 2，（Ar ＝ 2-苯甲酰基-4，6-二甲基苯基）}，C1，R ＝ H；C2，R ＝ An；C3，R ＝ Ph）。这些钯配合物的结构已得到很好的表征，而C1和C3则通过X射线衍射进一步表征。对杂芳烃的直接CH键芳构化筛选了预催化剂的催化性能。二齿N，N-钯络合物C3与两个主链和ñ -芳基膨松性被发现是在有氧条件下高效率的预催化剂。钯负载量低至0.5-0.1 mol％，各种具有挑战性的庞大的空间芳基溴化物和杂芳基溴化物的杂芳烃都适用于这种交叉偶联反应。
• Synthesis of trisubstituted thiazoles by ligand-free palladium-catalyzed direct 5-arylation of 2,4-disubstituted thiazoles under conventional and microwave-assisted heating
  作者：Su Kang Kim、Ji-Hyun Kim、Young Chul Park、Jae Won Kim、Eul Kgun Yum

  DOI：10.1016/j.tet.2013.10.053

  日期：2013.12

  Trisubstituted thiazoles were synthesized with excellent yields using ligand-free, palladium-catalyzed, direct 5-arylation of 2,4-disubstituted thiazole and conventional or microwave-assisted heating. The palladium-catalyzed reaction yields were significantly influenced by LiCI additive, solvent, and heating method. The reaction times were reduced dramatically by employing microwave radiation instead of conventional heating. The synthetic methods can be applied to diverse 2,4,5-trisubstituted thiazoles by varying the aryl bromide and disubstituted thiazole reactants. (C) 2013 Elsevier Ltd. All rights reserved.
• Developing Bis(imino)acenaphthene-Supported <i>N</i>-Heterocyclic Carbene Palladium Precatalysts for Direct Arylation of Azoles
  作者：Li-Qun Hu、Rong-Li Deng、Yan-Fen Li、Cui-Jin Zeng、Dong-Sheng Shen、Feng-Shou Liu

  DOI：10.1021/acs.organomet.7b00784

  日期：2018.1.22

  On the basis of the strategy of developing highly efficient protocol for Pd-catalyzed cross-coupling reactions, a series of bulky bis(imino)acenaphthene (BIAN)-supported Pd-PEPPSI complexes were synthesized, characterized, and applied in direct arylation of azoles. The effect of backbone and N-moieties on NHCs was evaluated, and the reaction conditions were optimized. It was found that the bulky Pd-PEPPSI complexes could be successfully employed in cross-coupling of (hetero)aryl bromides with azoles at a low palladium loading of 0.5-0.05 mol % under aerobic conditions, demonstrating the ease of manipulation without glovebox and handling of solvents.
• Camphyl-based α-diimine palladium complexes: highly efficient precatalysts for direct arylation of thiazoles in open-air
  作者：Fu-Min Chen、Dong-Dong Lu、Li-Qun Hu、Ju Huang、Feng-Shou Liu

  DOI：10.1039/c7ob00856b

  日期：——

  Based on the strategy of the development of phosphine-free palladium-catalyzed direct C–H arylation, a series of camphyl-based α-diimine palladium complexes bearing sterically bulky substituents were synthesized and characterized. The palladium complexes were applied for the cross-coupling of thiazole derivatives with aryl bromides. The effect of the sterically bulky substituent on the N-aryl moiety

  基于开发无膦钯催化的直接CHH芳基化的策略，合成并表征了一系列基于迷迭香的带有空间庞大取代基的α-二亚胺钯配合物。钯配合物用于噻唑衍生物与芳基溴化物的交叉偶联。筛选了体积庞大的取代基对N-芳基部分的影响以及反应条件。在最佳方案下，在露天条件下，在钯含量为0.2 mol％的情况下，可以将宽范围的芳基溴化物与噻唑平稳地偶联，并获得良好或优异的收率。