8-chloro-3-phenyl-[1,2,4]triazolo[4,3-a]pyridine | 135782-64-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 8-chloro-3-phenyl-[1,2,4]triazolo[4,3-a]pyridine
• CAS: 135782-64-8
• 化学式: C₁₂H₈ClN₃
• 分子量: 229.669
• InChiKey: ASEIZQFWGZKAKO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  16
• 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

安全信息

• 海关编码：
  2933990090

反应信息

• 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 8-chloro-3-phenyl-[1,2,4]triazolo[4,3-a]pyridine
  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

• 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。
• 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。
• A convenient one-pot synthesis of N-fused 1,2,4-triazoles via oxidative cyclization using chromium (VI) oxide
  作者：Ashish Bhatt、Rajesh K. Singh、Ravi Kant

  DOI：10.1080/00397911.2018.1529795

  日期：2019.1.2

  Abstract A facile one-pot synthesis of N-fused 1,2,4-triazoles from heterocyclic hydrazines and aldehydes is reported. The reaction is efficiently promoted by chromium (VI) oxide to afford the desired products mostly in high yields and in relatively short time. The high yield of the products and short reaction time are notable advantages of the developed protocol. This protocol is effective toward

  摘要 报道了一种从杂环肼和醛中简便地一锅法合成 N-稠合 1,2,4-三唑的方法。该反应通过氧化铬 (VI) 有效促进，以高产率和相对较短的时间提供所需的产物。产品的高产率和反应时间短是所开发协议的显着优势。该协议对具有不同功能的各种基板有效。图形概要
• Metal free [4+1] and [5+1] annulation reactions to prepare heterocycles using DMF and its derivatives as one-carbon source
  作者：Yiwen Xu、Bei Shen、Lingfeng Liu、Chunhua Qiao

  DOI：10.1016/j.tetlet.2020.151844

  日期：2020.5

  in a variety of pharmaceutical and agrochemical agents. Herein, we report a highly efficient and practical method using DMF and its derivative for the [4+1] and [5+1] annulation reactions to prepare these heterocycles. This metal free reaction takes advantages of shelf stable DMF as solvent and carbon donor, imidazole chloride as catalyst, the mild reaction condition tolerates a broad substrate range

  1,2,4-三唑并[3,4- a ]吡啶和相关的杂环以及取代的三嗪是在各种药物和农用化学试剂中普遍发现的支架。在这里，我们报告了一种高效且实用的方法，该方法使用DMF及其衍生物进行[4 + 1]和[5 + 1]环化反应，以制备这些杂环。这种无金属的反应利用了贮存稳定的DMF作为溶剂和碳供体，使用咪唑氯化物作为催化剂的优势，温和的反应条件可耐受广泛的底物范围并替代。制备的3-未取代的1,2,4-三唑并[3,4- a ]吡啶和衍生物允许在3-位进一步引入各种官能团。
• Synthesis of 1,2,4-Triazolo[4,3-<i>a</i> ]pyridines and Related Heterocycles by Sequential Condensation and Iodine-Mediated Oxidative Cyclization
  作者：Ertong Li、Zhiyuan Hu、Lina Song、Wenquan Yu、Junbiao Chang

  DOI：10.1002/chem.201601744

  日期：2016.7.25

  A facile and efficient approach to access 1,2,4‐triazolo[4,3‐a]pyridines and related heterocycles has been accomplished through condensation of readily available aryl hydrazines with corresponding aldehydes followed by iodine‐mediated oxidative cyclization. This transition‐metal‐free synthetic process is broadly applicable to a variety of aromatic, aliphatic, and α,β‐unsaturated aldehydes, and can

  通过容易获得的芳基肼与相应的醛缩合，然后由碘介导的氧化环化反应，可以轻松而有效地获得1,2,4-三唑并[4,3- a ]吡啶和相关杂环。这种无过渡金属的合成方法广泛适用于各种芳香族，脂肪族和α，β-不饱和醛类，并且可以以克为单位方便地进行。