Tetraoxa [24] porphyrinogen(4.0.4.0)/tetraoxa[22]porphyrin(4.0.4.0) dication a further isomer of the aromatic 22π-tetraoxaporphyrins
作者:Gottfried Märkl、Markus Hafner、Peter Kreitmeier、Thomas Burgemeister、Fritz Kastner、Michael Porsch、Jörg Daub
DOI:10.1016/0040-4020(95)01041-6
日期:1996.2
While the antiaromatic tetraoxa[24]porphyrinogen(2.2.2.2) 1 (trans,cis,trans,cis) and the corresponding aromatic dication 12+ have been published recently, the synthesis of the title compounds is described for the first time. Beside the cis, trans,cis, trans-tetraoxa[24]porphyrinogen(4.0.4.0) 2b the isomeric porphyrinogens 2a (trans, cis,cis,trans) and 2c (all-trans in the cisoid conformation) could
虽然最近已经发表了抗芳香族四氧杂[24]卟啉原(2.2.2.2)1(反式,顺式,反式,顺式)和相应的芳香族指示剂1 2+,但首次描述了标题化合物的合成。旁边的顺式,反式,顺式,反式-tetraoxa [24]卟啉原(4.0.4.0)2B异构卟啉原2a中(反式,顺式,顺式,反式)和图2c(所有-反式在cisoid构象)可被分离。四氧杂[22]卟啉(4.0.4.0)的指示是一个芳香的22π系统,它仅以顺,反,顺,反构型存在。指示剂2b 2+可以用四-N,N-二甲基氨基乙烯还原,得到纯的卟啉原2b。描述了系统2 / 2b 2+的电化学和AM1计算。