Synthesis and spectroscopic properties of aniline tetramers. Comparative studies
作者:Irena Kulszewicz-Bajer、Izabela Różalska、Małgorzata Kuryłek
DOI:10.1039/b311096f
日期:——
A new synthetic method involving SNAr coupling of 4-fluoronitrobenzene to arylamines, followed by the reduction of the nitro groups, has been developed. Two types of aniline oligomers, namely Ph/NH2 and NH2/NH2 tetramers have been prepared by this method. Tetramers in the leucoemeraldine and in the emeraldine oxidation states were characterized by NMR, UV-Vis-NIR, IR and mass spectroscopies. It shown that the NH2/NH2 tetramer oxidized to the emeraldine state forms two isomers: syn and anti. The oxidation of the Ph/NH2 tetramer leads to the creation of positional isomers, depending on the synthetic method.
我们开发出了一种新的合成方法,即先将 4-氟硝基苯与芳基胺进行 SNAr 偶联,然后再还原硝基。通过这种方法制备了两种类型的苯胺低聚物,即 Ph/NH2 和 NH2/NH2 四聚物。通过核磁共振、紫外-可见-近红外光谱、红外光谱和质谱分析,对处于白绿宝石氧化态和绿宝石氧化态的四聚体进行了表征。结果表明,氧化成绿宝石态的 NH2/NH2 四聚体会形成两种异构体:同步异构体和反同步异构体。Ph/NH2 四聚体的氧化会产生位置异构体,具体取决于合成方法。