5-氯-2-(4-氯苯基)-1,3-苯并恶唑 | 955-77-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 5-氯-2-(4-氯苯基)-1,3-苯并恶唑
• 英文名称: 5-chloro-2-(4-chlorophenyl)-1,3-benzoxazole
• 英文别名: 5-chloro-2-(4-chlorophenyl)benzo[d]oxazole；2-(4-chloro-phenyl)-5-chlorobenzoxazole；5-chloro-2-(4-chlorophenyl)benzoxazole；5-chloro-2-(p-chlorophenyl)benzoxazole；5-chloro-2-(4-chloro-phenyl)-benzooxazole；2-(4-Chlor-phenyl)-5-chlor-benzoxazol
• CAS: 955-77-1
• 化学式: C₁₃H₇Cl₂NO
• 分子量: 264.111
• InChiKey: OUUDBCFYINOZSI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.7
• 重原子数：
  17
• 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：
  26
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  4-氯-N-(2-羟基苯基)苯甲酰胺 在 iron(III) chloride hexahydrate 作用下， 以 甲苯 为溶剂， 反应 20.0h， 以68%的产率得到5-氯-2-(4-氯苯基)-1,3-苯并恶唑
  参考文献：
  名称：

  氯化铁 (III) 介导的对位选择性 CH 官能化：获得 C5-氯和 C5,C7-二氯/二茴香基取代的 2-芳基苯并恶唑

  摘要：

  开发了氯化铁 (III) 介导的对位选择性 C-H 氯化和随后的 2-氨基苯酚环化以合成 C5-和 C5、C7-氯化苯并恶唑。此外，还探索了三氯化铁对氨基苯酚与苯甲醚的氧化交叉脱氢偶联，以实现远程苯甲酰化苯并恶唑。

  DOI：

  10.1002/adsc.202101359

文献信息

• Synthesis of 2-substituted pyrimidines and benzoxazoles via a visible-light-driven organocatalytic aerobic oxidation: enhancement of the reaction rate and selectivity by a base
  作者：Lin Wang、Zhi-Gang Ma、Xiao-Jing Wei、Qing-Yuan Meng、Deng-Tao Yang、Shao-Fu Du、Zi-Fei Chen、Li-Zhu Wu、Qiang Liu

  DOI：10.1039/c4gc00337c

  日期：——

  An efficient visible-light-driven photocatalytic oxidation of various 2-substituted dihydropyrimidines and phenolic imines has been achieved using an organic photocatalyst eosin Y bis(tetrabutyl ammonium salt) (TBA-eosin Y) and inexpensive oxidant molecular oxygen. With the aid of a base, significantly enhanced photoinduced electron transfer from substrates dihydropyrimidines or phenolic imines to the excited state of TBA-eosin Y has enabled the aerobic oxidation to yield 2-(methylthio)pyrimidines or 2-arylbenzoxazoles selectively.

  利用有机光催化剂藻红Y双(四丁基铵盐)(TBA-藻红Y)和廉价氧化剂分子氧，已经实现了各种2-取代二氢嘧啶和酚亚胺的高效可见光驱动光催化氧化反应。在碱的辅助下，从底物二氢嘧啶或酚亚胺到TBA-藻红Y激发态的显著增强的光诱导电子转移，使得空气氧化能够选择性地生成2-(甲硫基)嘧啶或2-芳基苯并噁唑。
• Straightforward synthesis of benzoxazoles and benzothiazoles via photocatalytic radical cyclization of 2-substituted anilines with aldehydes
  作者：Hao Anh Nguyen Le、Long Hoang Nguyen、Quynh Nhu Ba Nguyen、Hai Truong Nguyen、Khang Quoc Nguyen、Phuong Hoang Tran

  DOI：10.1016/j.catcom.2020.106120

  日期：2020.10

  Eosin Y-catalyzed one-pot coupling and cyclization of o-substituted anilines with aldehydes to form benzoxazoles and benzothiazoles under mild condition has been developed. The reaction scope was broadly tolerant of various 2-substituted anilines and aldehydes. The desired products were obtained in high yields with the use of eosin Y as a photocatalyst under a substantial refinement of reaction conditions

  曙红Y催化一锅耦合和邻位取代苯胺与醛环化在温和条件下形成苯并恶唑和苯并噻唑。反应范围广泛耐受各种2-取代的苯胺和醛。与以前的文献相比，在显着改善反应条件的条件下，使用曙红Y作为光催化剂可以高收率获得所需产物。基于观察到的实验结果，提出了一种涉及自由基过程的合理机制。
• Deep eutectic solvent-catalyzed arylation of benzoxazoles with aromatic aldehydes
  作者：Phuong Hoang Tran、Anh-Hung Thi Hang

  DOI：10.1039/c8ra01094c

  日期：——

  A novel and efficient methodology for the arylation of benzoxazoles with aromatic aldehydes catalyzed by deep eutectic solvent has been developed. The reaction smoothly proceeded with a wide range of substrates to give the desired products in high yields within short reaction time. Deep eutectic solvents are easily recovered and reused without significant loss of catalytic activity.

  开发了一种由深共熔溶剂催化苯并恶唑与芳香醛芳基化的新型有效方法。该反应在各种底物上顺利进行，在很短的反应时间内以高产率得到所需的产物。低共熔溶剂很容易回收和重复使用，而不会显着损失催化活性。
• p -Toluenesulfonic acid-catalyzed metal-free formal [4 + 1] heteroannulation via N H/O H/S H functionalization: One-pot access to 2-aryl/hetaryl/alkyl benzazole derivatives
  作者：Abhijeet Srivastava、Gaurav Shukla、Maya Shankar Singh

  DOI：10.1016/j.tet.2016.12.073

  日期：2017.2

  concise and direct one-pot [4 + 1] synthetic strategy for the construction of 2-substituted benzazoles such as benzoxazoles and benzothiazoles has been disclosed in high yields (80–98%) by cascade coupling reaction of 2-amino(thio)phenols with β-oxodithioesters. The current approach enables NH/OH/SH functionalization in one-pot under solventless condition leading to diverse benzazoles without use of any

  通过2-氨基（硫代）的级联偶联反应，已公开了一种高产率（80-98％）的简洁，直接的一锅[4 +1]合成策略，用于构建2-取代的苯并唑，如苯并恶唑和苯并噻唑酚与β-氧二硫代酯。目前的方法可以在无溶剂条件下在一锅中实现N H / O H / S H官能化，从而无需使用任何外部金属即可产生多种苯并恶唑。各种各样的2-氨基（硫代）酚和β-氧二硫代酯均具有出色的官能团耐受性，可用于该转化。此外，我们通过证明其与DNA拓扑异构酶II抑制剂的多样化多样化的相容性，抢占了这一新策略的广泛含义。
• Palladium-Catalyzed Direct Arylations, Alkenylations, and Benzylations through C−H Bond Cleavages with Sulfamates or Phosphates as Electrophiles
  作者：Lutz Ackermann、Sebastian Barfüsser、Jola Pospech

  DOI：10.1021/ol9028034

  日期：2010.2.19

  A catalytic system comprised of Pd(OAc)2 and bidentate ligand dppe enabled first direct arylations with moisture-stable aryl sulfamates as electrophiles, and proved applicable to unprecedented C−H bond functionalizations with easily accessible alkenyl phosphates as well as benzyl phosphates.

  由Pd（OAc）2和二齿配体dppe组成的催化体系能够首先将湿气稳定的芳基氨基磺酸盐作为亲电子试剂进行直接芳基化反应，并证明适用于空前的C-H键官能化，且易于获得的烯基磷酸酯和磷酸苄酯。