Azulene‐Substituted Donor‐Acceptor Polymethines and 1,6’‐Bi‐, 1,6′;3,6′′‐Ter‐, and Quinqueazulenes via Zincke Salts: Synthesis, and Structural, Optical, and Electrochemical Properties
作者:Taku Shoji、Akari Yamazaki、Yukino Ariga、Mayumi Uda、Daichi Ando、Nichika Sasahara、Naohito Kai、Shunji Ito
DOI:10.1002/cplu.202100174
日期:2021.6
1,6′-biazulene unit have been successfully prepared from corresponding Zincke salts. The synthesis of polymethines through the reaction of Zincke salts with several amines, followed by a Knoevenagel reaction with malononitrile, was accomplished in moderate to high yields (40–92 %). Meanwhile, the reaction of Zincke salts with secondary amines and the subsequent sequential condensation-cyclization with
由1,6'-联苯菊烯单元组成的薁取代的供体-受体聚次甲基、双、三、和喹甘菊烯已由相应的锌盐成功制备。通过锌盐与几种胺的反应,然后与丙二腈进行克诺文格尔反应,合成了聚次甲基,以中等到高产率(40-92%)完成。同时,锌盐与仲胺的反应以及随后与环戊二烯化物离子的连续缩合环化,即所谓的齐格勒-哈夫纳法,产生了相应的1,6'-联薁烯,1,6';3,6''-分别是四萁烯和喹萁烯。通过单晶 X 射线结构分析、紫外/可见光谱、伏安分析、光谱电化学和理论揭示了薁取代的供体-受体聚次甲基、双、三和喹甘菊烯的结构、光学和电化学性质。计算。这些结果表明甘菊环上的取代基及其取代位置直接影响其反应活性、光学和电化学性能。