Cyclo[<i>m</i>]pyridine[<i>n</i>]pyrroles: Hybrid Macrocycles That Display Expanded π-Conjugation upon Protonation
作者:Zhan Zhang、Jong Min Lim、Masatoshi Ishida、Vladimir V. Roznyatovskiy、Vincent M. Lynch、Han-Yuan Gong、Xiaoping Yang、Dongho Kim、Jonathan L. Sessler
DOI:10.1021/ja211985k
日期:2012.3.7
Novel hybrid cyclo[m]pyridine[n]pyrroles have been synthesized using Suzuki coupling. Their NMR and optical spectroscopic features and solid state structural parameters provide support for the proposal that these species are best described as locally aromatic compounds devoid of long-range intersubunit conjugation. However, an extension of the pi-conjugation in the macrocycles can be realized through protonation, as inferred from optical spectroscopic and X-ray diffraction-based structural studies.