Synthesis of vinylated 5,10,15,20-tetraphenylporphyrins via Heck-type coupling reaction and their photophysical properties
作者:Mariette M. Pereira、Guillermo Muller、Juan Ignacio Ordinas、M. Em??lia Azenha、Lu??s G. Arnaut
DOI:10.1039/b203910a
日期:2002.8.27
The direct coupling reaction between substituted olefins and 5,10,15,20-tetrakis(4-bromophenyl)porphyrin, via a Heck-type reaction, constitutes a versatile method for the vinylation of 5,10,15,20-tetrakis(4-bromophenyl)porphyrin to yield new vinylated tetraphenylporphyrins quantitatively. Another strategy for the vinylporphyrin synthesis has been developed. A phosphapalladacycle has been used as catalyst for the coupling reaction between 4-bromoaryl aldehydes and olefins to yield vinyl aldehydes quantitatively. These aldehydes have been condensed with pyrrole, by the one-step nitrobenzene method, to give the corresponding vinylated tetraphenylporphyrins. Photophysical studies of these new porphyrins are also reported.
通过Heck反应,取代烯烃与5,10,15,20-四(4-溴苯基)卟啉之间的直接耦合反应构成了一种多功能的方法,可定量地对5,10,15,20-四(4-溴苯基)卟啉进行乙烯化反应,生成新的乙烯基四苯基卟啉。另一种乙烯基卟啉合成策略已经被开发出来。采用磷钯环作为催化剂,促使4-溴芳基醛与烯烃之间的耦合反应,定量生成乙烯基醛。这些醛通过一步硝基苯法与吡咯发生缩合,得到相应的乙烯基四苯基卟啉。此外,还报道了这些新卟啉的光物理研究。