3-苯基-1,2,4-三唑并[4,3-a]吡啶 | 778-65-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 3-苯基-1,2,4-三唑并[4,3-a]吡啶
• 英文名称: 3-phenyl-[1,2,4]triazolo[4,3-a]pyridine
• 英文别名: 3-Phenyl-s-triazolo<4,3-a>pyridin
• CAS: 778-65-4
• 化学式: C₁₂H₉N₃
• mdl: MFCD00709911
• 分子量: 195.224
• InChiKey: BKMNRMWBERCAFW-UHFFFAOYSA-N

物化性质

• 熔点：
  176 °C
• 密度：
  1.21±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  15
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  30.2
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3-苯基-1,2,4-三唑并[4,3-a]吡啶 在 palladium on activated charcoal 氢气 作用下， 以 盐酸 、 乙醇 为溶剂， 以8 g的产率得到3-phenyl-5,6,7,8-tetrahydro-1,2,4-triazolo<4,3-a>pyridine
  参考文献：
  名称：

  Bonanomi, Michele; Baiocchi, Leandro, Journal of Heterocyclic Chemistry, 1983, vol. 20, p. 1657 - 1660

  摘要：

  DOI：
• 作为产物：
  描述：

  苯甲醛腙 在 1,1'-双(二苯膦基)二茂铁二氯化钯(II)二氯甲烷复合物 、 chloramine T trihydrate 、 potassium carbonate 作用下， 以 2-甲基四氢呋喃 、 甲苯 为溶剂， 反应 2.0h， 生成 3-苯基-1,2,4-三唑并[4,3-a]吡啶
  参考文献：
  名称：

  Palladium-Catalyzed Triazolopyridine Synthesis: Synthesis of 7-Chloro-3-(2-Chlorophenyl)-1,2,4-Triazolo[4,3-a]Pyridine

  摘要：

  Chloramine-T is thermally unstable and heating of chloramines-T beyond the temperature disclosed in this procedure should not be conducted without further safety evaluation. Hydrazine should be handled in a fume hood as it is an animal carcinogen and has been identified it as a potential human carcinogen. In addition, anhydrous hydrazine is potentially explosive, especially in contact with metals, and should only be handled as its hydrate.

  DOI：

  10.15227/orgsyn.090.0287

文献信息

• A Convenient One-Pot Synthesis of Triazolopyridine and Related Heterocycle Fused-Triazole Analogs Through Copper Catalyzed Oxidative Cyclization Strategy
  作者：R. Srinivasan、J. Sembian Ruso、N. S. Nagarajan、R. Senthil Kumaran、G. Manickam

  DOI：10.1002/jhet.2331

  日期：2016.3

  One‐pot synthesis of heterocycle fused‐triazole analogs from the corresponding aldehydes and heteroarylhydrazines is demonstrated. Transformation of hydrazones to the desired systems was achieved by employing the oxidative cyclization with catalytic CuBr2 and oxone. This reaction condition is mild and selective, and a wide range of functional groups were able to sustain. An array of biologically important

  证明了从相应的醛和杂芳基肼一锅法合成杂环稠合三唑类似物。通过使用催化性的CuBr 2和氧杂环丁烷进行氧化环化，可将转化为所需的系统。该反应条件温和且选择性，并且能够维持多种官能团。以相当高的产率获得了一系列生物学上重要的三唑并吡啶，三唑并哒嗪，三唑并嘧啶和三唑并喹啉。
• I₂-TBHP-catalyzed one-pot highly efficient synthesis of 4,3-fused 1,2,4-triazoles from N-tosylhydrazones and aromatic N-heterocycles via intermolecular formal 1,3-dipolar cycloaddition
  作者：Surendra Babu Inturi、Biswajit Kalita、A. Jafar Ahamed

  DOI：10.1039/c6ob01926a

  日期：——

  I2-TBHP-catalyzed azomethine imine generation and subsequent regioselective 1,3-dipolar cycloaddition (DC) with aromatic N-heterocycles was developed to afford various 4,3-fused 1,2,4-triazoles in excellent yields. The method is operationally simple and highly efficient with broad functional group tolerance.

  开发了I 2 -TBHP催化的偶氮甲亚胺亚胺和随后的具有芳香族N-杂环的区域选择性1，3-偶极环加成（DC），以优异的产率提供了各种4，3-稠合的1,2,4-三唑。该方法操作简便且高效，具有宽泛的官能团耐受性。
• Electrochemical synthesis of 1,2,4-triazole-fused heterocycles
  作者：Zenghui Ye、Mingruo Ding、Yanqi Wu、Yong Li、Wenkai Hua、Fengzhi Zhang

  DOI：10.1039/c7gc03739b

  日期：——

  cross-coupling reaction has been developed under mild electrolytic conditions. In this atom- and step-economical one-pot process, valuable 1,2,4-triazolo[4,3-a]pyridines and related heterocyclic compounds could be synthesized efficiently from commercially available aliphatic or (hetero)aromatic aldehydes and 2-hydrazinopyridines. Various functional groups are compatible with this metal- and oxidant-free

  在温和的电解条件下已开发出无试剂的分子内脱氢C–N交叉偶联反应。在这种原子经济和一步经济的一锅法中，有价值的1,2,4-三唑并[4,3- a ]吡啶和相关的杂环化合物可以从可商购的脂族或（杂）芳族醛和2-肼基吡啶。各种官能团都与这种无金属和无氧化剂的方案兼容，可以轻松地以克为单位进行操作。这种新方法被应用于最畅销药物Xanax的合成和后期功能化，以在生物学相关的先导分子中产生化学多样性。
• Efficient Synthesis of 3-Substituted 1,2,4-Triazolo[4,3-a]pyridine by [Bis(Trifluroacetoxy)iodo]benzene-Catalyzed Oxidative Intramolecular Cyclization of Heterocyclic Hydrazones
  作者：Vikas S. Padalkar、Vikas S. Patil、Kiran R. Phatangare、Prashant G. Umape、N. Sekar

  DOI：10.1080/00397911003707162

  日期：2011.2.28

  Abstract A series of 1,2,4-triazolopyridines have been prepared by oxidative intramolecular cyclization of heterocyclic hydrazones with [bis(trifluroacetoxy)iodo]benzene. General applicability of this simple transformation was confirmed by synthesis of 1,2,4-triazolo[4,3-a]pyridine. The advantages of this protocol are the nontoxicity of catalyst and shorter reaction time to obtain good preparative

  摘要 通过杂环腙与[双(三氟乙酰氧基)碘]苯的分子内氧化环化反应制备了一系列1,2,4-三唑并吡啶。通过 1,2,4-三唑并 [4,3-a] 吡啶的合成证实了这种简单转化的普遍适用性。该协议的优点是催化剂的无毒和较短的反应时间，以获得良好的制备收率。
• Palladium-Catalyzed Coupling of Aldehyde-Derived Hydrazones: Practical Synthesis of Triazolopyridines and Related Heterocycles
  作者：Oliver R. Thiel、Michal M. Achmatowicz、Andreas Reichelt、Robert D. Larsen

  DOI：10.1002/anie.201001999

  日期：2010.11.2

  The palladium‐catalyzed intermolecular coupling of aldehyde‐derived hydrazones with chloroazines, followed by oxidative cyclization under mild conditions afforded access to a broad variety of bicyclic heterocyclic scaffolds (see scheme) that have potential for use in drug discovery.

  钯催化的醛衍生的azo酮与氯嗪的分子间偶联，然后在温和的条件下进行氧化环化，可以使用各种各样的双环杂环骨架（参见方案），这些骨架可能会用于药物发现。