| 131356-54-2

• 分子结构分类: 有机化合物 - 有机氮化合物
• CAS: 131356-54-2
• 化学式: C₁₅H₁₅ClN₂
• 分子量: 258.75
• InChiKey: JUODSVJHIZUYRX-GZTJUZNOSA-N

反应信息

• 作为产物：
  描述：

  以 苯 为溶剂， 生成
  参考文献：
  名称：

  Mechanism of thermal Z/E isomerization of substituted N-benzylideneanilines. Nature of the activated complex with an sp-hybridized nitrogen atom

  摘要：

  In order to study the mechanism of thermal geometrical isomerization involving a sp2-hybridized nitrogen atom, kinetic effects of substituent, solvent, and pressure were studied in substituted N-benzylideneanilines. The effect of the substituent on the aniline moiety was almost independent of the electronic nature of the benzylidene group, and the results could be described satisfactorily by log (k/k(o)) = rho[sigma-degrees + r+(sigma+-sigma-degrees)+ r-(sigma--sigma-degrees)], except for the 4-(dimethylamino) group. The r- values were more than twice as large as r+, suggesting strongly that the aniline ring is in conjugation not with the carbon-nitrogen pi bond but with the nitrogen lone pair in the transition state. The lower activation enthalpies and fairly large negative activation entropies observed in N-(4-X-benzylidene)4-nitroanilines also support this view. When a dimethylamino group exists in the 4-position of the aniline ring, the rate constants observed were larger than that expected from the above equation. This deviation suggests the existence of a reaction route where the two phenyl groups become coplanar in the transition state. Ab initio calculations on selected N-phenylformaldimines and N-benzylideneanilines were performed to characterize the actual relation between both reaction possibilities as alternative and parallel routes, respectively. On the basis of the experimental data, the rate constants for the two inversion isomerizations were estimated by assuming parallel reactions for three cases.

  DOI：

  10.1021/jo00068a042

文献信息

• Infrared Irradiation: Effective Promoter in the Formation of<i>N</i>‐Benzylideneanilines in the Absence of Solvent
  作者：Miguel Á. Vázquez、Miguel Landa、Leonor Reyes、René Miranda、Joaquín Tamariz、Francisco Delgado

  DOI：10.1081/scc-200026190

  日期：2004.1

  series of Schiff bases in the condensation reaction between benzaldehydes and anilines, in the absence of solvent. Benzaldehydes and anilines, containing either electron‐withdrawing or electron‐releasing groups, were assessed to identify any substituent effect on the formation of the Schiff bases. This methodology is characterized by ease of set‐up and work‐up, and the reaction yields were comparable with

  摘要 在无溶剂条件下，苯甲醛与苯胺的缩合反应中，红外辐射促进了一系列席夫碱的形成。对含有吸电子或放电子基团的苯甲醛和苯胺进行评估，以确定对席夫碱形成的任何取代基影响。该方法的特点是易于设置和处理，反应产率与之前报道的方法中获得的产率相当。此外，这种新程序对环境无害，因为在转化过程中没有使用溶剂。