1-(bis(4-bromophenyl)methyl)-1H-1,2,4-triazole

• 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: 1-(bis(4-bromophenyl)methyl)-1H-1,2,4-triazole
• 英文别名: 1-[Bis(4-bromophenyl)methyl]-1,2,4-triazole；1-[bis(4-bromophenyl)methyl]-1,2,4-triazole
• 化学式: C₁₅H₁₁Br₂N₃
• 分子量: 393.08
• InChiKey: OAEVDJVSJNYEON-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.7
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.07
• 拓扑面积：
  30.7
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  potassiumhexacyanoferrate(II) trihydrate 、 1-(bis(4-bromophenyl)methyl)-1H-1,2,4-triazole 在 sodium carbonate 作用下， 以 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 24.0h， 以87%的产率得到来曲唑
  参考文献：
  名称：

  Immobilized palladium nanoparticles on a cyclodextrin-polyurethane nanosponge (Pd-CD-PU-NS): An efficient catalyst for cyanation reaction in aqueous media

  摘要：

  Immobilized palladium nanoparticles on a cyclodextrin-polyurethane nanosponge (Pd-CD-PU-NS) were found to be an efficient heterogeneous catalyst in the cyanation reaction of aryl halides in aqueous media. This catalyst system is containing palladium nanoparticles with a size of similar to 7 nm. Moreover, the CD-PU-NS support formed microsphere-shaped structures with a size of similar to 100-200 nm. The TEM images show that Pd nanoparticles were formed in near spherical shape morphology and were immobilized in the structure of the CD-PU-NS support. Under our optimized reaction conditions, aryl cyanides were obtained in high yields in the presence of the Pd-CD-PU-NS catalyst. Our results demonstrated that the Pd-CD-PU-NS catalyst is highly effective in the cyanation reaction in aqueous media. Furthermore, the catalyst could be simply extracted from the reaction mixture, providing an efficient methodology for the synthesis of aryl cyanides. The Pd-CD-PU-NS catalyst could be recycled four times with almost consistent catalytic efficiency.

  DOI：

  10.1016/j.ica.2019.05.021
• 作为产物：
  描述：

  1H-1,2,4-三唑 、 二(4-溴苯基)甲醇 在 aluminium(III) triflate 作用下， 以 硝基甲烷 为溶剂， 反应 6.0h， 以98%的产率得到1-(bis(4-bromophenyl)methyl)-1H-1,2,4-triazole
  参考文献：
  名称：

  三氟甲磺酸铝作为一种强大的催化剂，可直接醇化醇，包括吸电子基团取代的苯酚

  摘要：

  三氟甲磺酸铝[Al（OTf）3 ]有效催化具有吸电子（F，Br，I，NO 2或CN）取代基的烯丙醇，苄醇和苯羟基的直接胺化，从而以高收率提供相应的联芳基胺，然后将二溴取代的产物进一步转化为来曲唑。

  DOI：

  10.1002/adsc.201200536

文献信息

• <i>Ex situ</i> generation of stoichiometric HCN and its application in the Pd-catalysed cyanation of aryl bromides: evidence for a transmetallation step between two oxidative addition Pd-complexes
  作者：Steffan K. Kristensen、Espen Z. Eikeland、Esben Taarning、Anders T. Lindhardt、Troels Skrydstrup

  DOI：10.1039/c7sc03912c

  日期：——

  methodology was also suitable for the synthesis of 13C-labelled benzonitriles with ex situ generated 13C-hydrogen cyanide. Stoichiometric studies with the metal complexes were undertaken to delineate the mechanism for this catalytic transformation. Treatment of Pd(P(tBu)3)2 with H13CN in THF provided two Pd-hydride complexes, (P(tBu)3)2Pd(H)(13CN), and [(P(tBu)3)Pd(H)]2Pd(13CN)4, both of which were isolated

  首次报道了使用接近化学计量和气态氰化氢的钯催化芳基溴化物氰化的方案。采用两室反应器在密闭环境中安全释放异位生成的HCN，事实证明该方法在Ni催化的氢氰化反应中非常有效。随后，利用该装置将一定范围的芳基和杂芳基溴化物（28个实例）直接高产率地转化为相应的苄腈，而无需使用氰化物盐。在二恶烷-水溶剂混合物中，使用Pd（0）预催化剂P（t Bu）3 -Pd-G3和弱碱乙酸钾实现氰化。该方法也适用于13的合成C-标记的苄腈与异位生成13 C-氰化氢。进行了金属配合物的化学计量研究，以描述这种催化转化的机理。在THF中用H 13 CN处理Pd（P（t Bu）3）2提供了两种Pd-氢化物配合物（P（t Bu）3）2 Pd（H）（13 CN）和[（P（t Bu） ）3）Pd（H）] 2 Pd（13 CN）4，两者均已分离，并通过NMR光谱和X射线晶体结构分析进行了表征。当在KOAc存在下在THF∶水混合物中进行相同的反应时，仅形成（P（t
• Aluminum Triflate as a Powerful Catalyst for Direct Amination of Alcohols, Including Electron‐Withdrawing Group‐Substituted Benzhydrols
  作者：Takashi Ohshima、Junji Ipposhi、Yasuhito Nakahara、Ryozo Shibuya、Kazushi Mashima

  DOI：10.1002/adsc.201200536

  日期：2012.9.17

  Direct aminations of allylic alcohols, benzylic alcohols, and benzhydrols with electron‐withdrawing (F, Br, I, NO2, or CN) substituents were efficiently catalyzed by aluminum triflate [Al(OTf)3] to afford the corresponding biarylamines in high yield, and the dibromo‐substituted product was further transformed into letrozole.

  三氟甲磺酸铝[Al（OTf）3 ]有效催化具有吸电子（F，Br，I，NO 2或CN）取代基的烯丙醇，苄醇和苯羟基的直接胺化，从而以高收率提供相应的联芳基胺，然后将二溴取代的产物进一步转化为来曲唑。
• Immobilized palladium nanoparticles on a cyclodextrin-polyurethane nanosponge (Pd-CD-PU-NS): An efficient catalyst for cyanation reaction in aqueous media
  作者：Soheila Khajeh Dangolani、Sara Sharifat、Farhad Panahi、Ali Khalafi-Nezhad

  DOI：10.1016/j.ica.2019.05.021

  日期：2019.8

  Immobilized palladium nanoparticles on a cyclodextrin-polyurethane nanosponge (Pd-CD-PU-NS) were found to be an efficient heterogeneous catalyst in the cyanation reaction of aryl halides in aqueous media. This catalyst system is containing palladium nanoparticles with a size of similar to 7 nm. Moreover, the CD-PU-NS support formed microsphere-shaped structures with a size of similar to 100-200 nm. The TEM images show that Pd nanoparticles were formed in near spherical shape morphology and were immobilized in the structure of the CD-PU-NS support. Under our optimized reaction conditions, aryl cyanides were obtained in high yields in the presence of the Pd-CD-PU-NS catalyst. Our results demonstrated that the Pd-CD-PU-NS catalyst is highly effective in the cyanation reaction in aqueous media. Furthermore, the catalyst could be simply extracted from the reaction mixture, providing an efficient methodology for the synthesis of aryl cyanides. The Pd-CD-PU-NS catalyst could be recycled four times with almost consistent catalytic efficiency.