3-phenyl-5-(pyridin-2-yl)-1,2,4-oxadiazole | 58598-96-2

• 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-phenyl-5-(pyridin-2-yl)-1,2,4-oxadiazole
• 英文别名: 3-Phenyl-5-(2-pyridyl)-1,2,4-oxadiazole；3-phenyl-5-pyridin-2-yl-1,2,4-oxadiazole
• CAS: 58598-96-2
• 化学式: C₁₃H₉N₃O
• 分子量: 223.234
• InChiKey: PLEXSHRWUIGICB-UHFFFAOYSA-N

物化性质

• 熔点：
  116 °C(Solv: water (7732-18-5); ethanol (64-17-5))
• 沸点：
  406.1±37.0 °C(Predicted)
• 密度：
  1.223±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  17
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  51.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  苯甲酰胺肟 在 N,N'-羰基二咪唑 、 sodium hydroxide 作用下， 以 二甲基亚砜 为溶剂， 反应 20.5h， 生成 3-phenyl-5-(pyridin-2-yl)-1,2,4-oxadiazole
  参考文献：
  名称：

  容易从室温获得的1,2,4-恶二唑核的组装，该酰胺由现成的a胺肟和羧酸制成

  摘要：

  报道了在超碱促进条件下从a胺肟和羧酸合成3,5-二取代-1,2,4-恶二唑的一锅法环境温度程序。

  DOI：

  10.1016/j.tetlet.2018.06.019

文献信息

• Probabilistic Accident Consequence Uncertainty Analysis of the Food Chain Module in the COSYMA Package
  作者：J. Brown、J.A. Jones

  DOI：10.1093/oxfordjournals.rpd.a033158

  日期：2000.8.2

  This paper describes the uncertainty analysis of the food chain module of COSYMA and the uncertainty distributions on the input parameter values for the food chain model provided by the expert panels that were used for the analysis. Two expert panels were convened, covering the areas of soil and plant transfer processes and transfer to and through animals. The aggregated uncertainty distributions from the experts for the elicited variables were used in an uncertainty analysis of the food chain module of COSYMA. The main aim of the module analysis was to identify those parameters whose uncertainty makes large contributions to the overall uncertainty and so should be included in the overall analysis.

  本文描述了COSYMA食物链模块的不确定性分析以及为分析提供的食物链模型输入参数值的不确定分布，这些分布由专家小组提供。两个专家小组参与了讨论，涵盖了土壤和植物转移过程以及通过动物的转移过程。专家们对诱发变量的不确定性分布进行了汇总，并将其用于COSYMA食物链模块的不确定性分析。该模块分析的主要目的是识别那些不确定性对整体不确定性贡献较大的参数，因此应在整体分析中予以考虑。
• Base-mediated one-pot synthesis of 1,2,4-oxadiazoles from nitriles, aldehydes and hydroxylamine hydrochloride without addition of extra oxidant
  作者：Wei Wang、Hao Xu、Yuanqing Xu、Tao Ding、Wenkai Zhang、Yanrong Ren、Haibo Chang

  DOI：10.1039/c6ob01794k

  日期：——

  A simple base-mediated one-pot synthesis of 3,5-disubstituted 1,2,4-oxadiazoles from nitriles, aldehydes and hydroxylamine hydrochloride has been developed, in which the aldehydes act as both substrates and oxidants. The reactions include three sequential procedures: base-promoted intermolecular addition of hydroxylamine to nitrile to lead to amidoxime, treatment of the amidoxime with an aldehyde to

  已经开发了由腈，醛和盐酸羟胺形成的简单的碱介导的一锅法合成3,5-二取代的1,2,4-恶二唑，其中醛既充当底物又充当氧化剂。反应包括三个顺序程序：碱促进的羟胺分子间加成到腈中以生成a胺肟；用醛处理the胺肟以形成4,5-二氢-1,2,4-恶二唑；以及氧化4， 5-二氢-1,2,4-恶二唑通过使用另一种醛得到1,2,4-恶二唑。该方法代表了合成3,5-二取代的1,2,4-恶二唑的直接而简单的方法。
• Orthogonal aerobic conversion of N-benzyl amidoximes to 1,2,4-oxadiazoles or quinazolinones
  作者：Feng-Lian Zhang、Yi-Feng Wang、Shunsuke Chiba

  DOI：10.1039/c3ob41393d

  日期：——

  Concise synthesis of 1,2,4-oxadiazoles was achieved by heating N-benzyl amidoximes with K3PO4 in DMF at 60 °C under an O2 atmosphere via benzylic C–H oxygenation. On the other hand, aerobic treatment of N-benzyl amidoximes with Cs2CO3 in DMSO at 100 °C could result in oxidative skeletal rearrangement to deliver quinazolinones as a major product. This orthogonal product selectivity could be realized by difference of the reaction temperature as well as selection of the solvents and inorganic bases.

  通过在60°C下，在O2气氛中使用K3PO4作为催化剂，将N-苄基脒肟在DMF中加热，实现了1,2,4-噁二唑的简洁合成，这一过程涉及苄基C-H氧合作用。另一方面，在100°C下，使用Cs2CO3作为催化剂，在DMSO中对N-苄基脒脟进行需氧处理，可能导致骨架氧化重排，主要产物为喹唑啉酮。这种正交的产品选择性可以通过反应温度、溶剂和无机碱的选择来实现。
• Copper‐Catalyzed Three‐Component Cascade Reaction of Benzaldehyde with Benzylamine and Hydroxylamine or Aniline: Synthesis of 1,2,4‐Oxadiazoles and Quinazolines
  作者：Chao Wang、Xiyan Rui、Dongjuan Si、Rupeng Dai、Yueyue Zhu、Hongmei Wen、Wei Li、Jian Liu

  DOI：10.1002/adsc.202001535

  日期：2021.6.8

  The analogous three-component synthesis strategy for substituted 1,2,4-oxadiazole and quinazoline derivatives from readily available benzaldehyde, benzylamine and hydroxylamine or aniline has been developed. Both the cascade reaction sequences involves nucleophilic addition of C−N bond, introduction a halogen donor, nucleophilic substitution and Cu(II)-catalyzed aerobic oxidation. This synthesis methodology

  已经开发了从容易获得的苯甲醛、苄胺和羟胺或苯胺中取代 1,2,4-恶二唑和喹唑啉衍生物的类似三组分合成策略。两个级联反应序列都涉及 CN 键的亲核加成、引入卤素供体、亲核取代和 Cu(II) 催化的有氧氧化。这种合成方法表现出良好的收率、广泛的底物范围和作为绿色氧化剂的氧气。因此，该合成方案为从容易和简单的起始材料构建取代的 1,2,4-恶二唑和喹唑啉提供了策略。
• TBAI/TBHP-Catalyzed Synthesis of [1,2,4]Triazolo[4,3-a]pyridines and 3,5-Diaryl-1,2,4-oxadiazoles via Oxidative Cleavage of C=C Double Bond
  作者：S. L. Matcha、S. Vidavalur

  DOI：10.1134/s1070428021090141

  日期：2021.9

  Abstract A simple and efficient protocol has been described for the synthesis of [1,2,4]triazolo[4,3-a]pyri­dines and 3,5-disubstituted-1,2,4-oxadiazoles by reacting 2-hydrazinylpyridine and benzamidoximes, respec­tively, with styrenes via TBAI/TBHP-mediated oxidative cleavage of C=C bond under ligand- and metal-free conditions.

  摘要 通过 2-肼基吡啶和苯甲胺肟反应合成 [1,2,4] 三唑并 [4,3- a ] 吡啶和 3,5-二取代-1,2,4-恶二唑的简单有效的方案已被描述，分别在无配体和无金属条件下通过 TBAI/TBHP 介导的 C=C 键氧化裂解与苯乙烯。