School of Chemistry, University of East Anglia , Norwich NR4 7TJ, U.K.
J Org Chem. 2013 Sep 20;78(18):9505-11. doi: 10.1021/jo401551c. Epub 2013 Sep 11.
Triphenylene twins are intriguing structures, and those bridged through their 3,6-positions by dipyrromethene units give a new class of macrocycles that can be viewed as rigid, expanded porphyrin derivatives in which coplanarity is enforced in a formally antiaromatic π system. Somewhat surprisingly, however, macrocyclization leads to significant overall stabilization of the dipyrromethene chromophores.
三联苯桥联二吡咯并甲烷大环化合物是一类引人关注的结构，其中通过 3,6-位桥联的二吡咯并甲烷单元赋予了大环化合物以刚性、扩展的卟啉衍生物的特征，其特征在于在形式上的反芳香性π体系中实现了共面性。然而，有些令人惊讶的是，大环化导致二吡咯并甲烷生色团的整体稳定性有显著提高。
