3-ethyl-5-(4'-nitrophenyl)-1,3,4-oxadiazole | 46713-46-6

• 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: 3-ethyl-5-(4'-nitrophenyl)-1,3,4-oxadiazole
• 英文别名: 5-ethyl-2-(4-nitrophenyl)-1,3,4-oxadiazole；2-ethyl-5-(4-nitro-phenyl)-[1,3,4]oxadiazole；ethyl-(4-nitro-phenyl)-[1,3,4]oxadiazole；Aethyl-(4-nitro-phenyl)-[1,3,4]oxadiazol；2-Aethyl-5-p-nitrophenyl-1,3,4-oxadiazol；2-Ethyl-5-(4-nitrophenyl)-1,3,4-oxadiazole
• CAS: 46713-46-6
• 化学式: C₁₀H₉N₃O₃
• mdl: MFCD11094977
• 分子量: 219.2
• InChiKey: PLPSPGNBNDLLTD-UHFFFAOYSA-N

物化性质

• 沸点：
  384.3±44.0 °C(Predicted)
• 密度：
  1.299±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  16
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  84.7
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  3-ethyl-5-(4'-nitrophenyl)-1,3,4-oxadiazole 在 sodiumsulfide nonahydrate 作用下， 以 1,4-二氧六环 、 水 为溶剂， 反应 0.75h， 以70%的产率得到2-(4'-aminophenyl)-5-ethyl-1,3,4-oxadiazole
  参考文献：
  名称：

  Synthesis and methemoglobinemia-inducing properties of benzocaine isosteres designed as humane rodenticides

  摘要：

  A number of isosteres (oxadiazoles, thiadiazoles, tetrazoles and diazines) of benzocaine were prepared and evaluated for their capacity to induce methemoglobinemia-with a view to their possible application as humane pest control agents. It was found that an optimal lipophilicity for the formation of methemoglobin (metHb) in vitro existed within each series, with 1,2,4-oxadiazole 3 (metHb% = 61.0 +/- 3.6) and 1,3,4-oxadiazole 10 (metHb% = 52.4 +/- 0.9) demonstrating the greatest activity. Of the 5 candidates (compounds 3, 10, 11, 13 and 23) evaluated in vivo, failure to induce a lethal end-point at doses of 120 mg/kg was observed in all cases. Inadequate metabolic stability, particularly towards hepatic enzymes such as the CYPs, was postulated as one reason for their failure. (C) 2014 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2014.02.013
• 作为产物：
  描述：

  N'-propionyl-4'-nitrobenzohydrazide 在 三氯氧磷 作用下， 反应 20.0h， 以20%的产率得到3-ethyl-5-(4'-nitrophenyl)-1,3,4-oxadiazole
  参考文献：
  名称：

  Synthesis and methemoglobinemia-inducing properties of benzocaine isosteres designed as humane rodenticides

  摘要：

  A number of isosteres (oxadiazoles, thiadiazoles, tetrazoles and diazines) of benzocaine were prepared and evaluated for their capacity to induce methemoglobinemia-with a view to their possible application as humane pest control agents. It was found that an optimal lipophilicity for the formation of methemoglobin (metHb) in vitro existed within each series, with 1,2,4-oxadiazole 3 (metHb% = 61.0 +/- 3.6) and 1,3,4-oxadiazole 10 (metHb% = 52.4 +/- 0.9) demonstrating the greatest activity. Of the 5 candidates (compounds 3, 10, 11, 13 and 23) evaluated in vivo, failure to induce a lethal end-point at doses of 120 mg/kg was observed in all cases. Inadequate metabolic stability, particularly towards hepatic enzymes such as the CYPs, was postulated as one reason for their failure. (C) 2014 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2014.02.013

文献信息

• Synthesis of 1,3,4-oxadiazolium and 1,3,4-oxadiazolo[3,2-a]pyridinium salts
  作者：G. V. Boyd、S. R. Dando

  DOI：10.1039/j39700001397

  日期：——

  is described. Numerous 3-aryl-1,3,4-oxadiazolium salts, containing a novel type of heterocyclic cation, have been prepared by the action of carboxylic anhydrides on diacylarylhydrazines in the presence of perchloric or fluoroboric acid. 1,3,4-Oxadiazolo[3,2-a]pyridinium salts are similarly formed from 1 -acylamino-2-pyridones. The stability of the salts and their i.r. and n.m.r. spectra are discussed

  已经研究了一些简单的1,3,4-恶二唑的质子化和烷基化，并描述了一种新的1,3,4-恶二唑的合成。在高氯酸或氟硼酸的存在下，通过羧酸酐对二酰基芳基肼的作用，已经制备了许多含有新型杂环阳离子的3-芳基-1,3,4-恶二唑鎓盐。类似地由1-酰基氨基-2-吡啶酮形成1,3,4-氧杂二唑[3,2- a ]吡啶鎓盐。讨论了盐的稳定性及其ir和nmr光谱。
• Efficient synthesis of 1,3,4-oxadiazoles promoted by NH4Cl
  作者：Krishna Kumar Gnanasekaran、Baskar Nammalwar、Maeghan Murie、Richard A. Bunce

  DOI：10.1016/j.tetlet.2014.10.028

  日期：2014.12

  An efficient and inexpensive approach to the synthesis of 2-substituted and 2,5-disubstituted 1,3,4-oxadiazoles from arylhydrazides and orthoesters is reported using catalytic NH4Cl. The conditions are mild, and thus, compatible with a variety of functional groups. The optimized reaction is performed using 30 mol % of NH4Cl in 100% EtOH and is generally complete within I h for non-aromatic orthoesters and 2-10 h for aromatic orthoesters. The reaction permits both electron-releasing and electron-withdrawing groups on the arylhydrazide substrate. Most products are formed in high yields and require only minimal purification. Compared with earlier reports, the current reactions proceed in shorter time and require less of the orthoester. (C) 2014 Elsevier Ltd. All rights reserved.
• Synthesis and methemoglobinemia-inducing properties of benzocaine isosteres designed as humane rodenticides
  作者：Daniel Conole、Thorsten M. Beck、Morgan Jay-Smith、Malcolm D. Tingle、Charles T. Eason、Margaret A. Brimble、David Rennison

  DOI：10.1016/j.bmc.2014.02.013

  日期：2014.4

  A number of isosteres (oxadiazoles, thiadiazoles, tetrazoles and diazines) of benzocaine were prepared and evaluated for their capacity to induce methemoglobinemia-with a view to their possible application as humane pest control agents. It was found that an optimal lipophilicity for the formation of methemoglobin (metHb) in vitro existed within each series, with 1,2,4-oxadiazole 3 (metHb% = 61.0 +/- 3.6) and 1,3,4-oxadiazole 10 (metHb% = 52.4 +/- 0.9) demonstrating the greatest activity. Of the 5 candidates (compounds 3, 10, 11, 13 and 23) evaluated in vivo, failure to induce a lethal end-point at doses of 120 mg/kg was observed in all cases. Inadequate metabolic stability, particularly towards hepatic enzymes such as the CYPs, was postulated as one reason for their failure. (C) 2014 Elsevier Ltd. All rights reserved.