Controlling charge-transfer properties through a microwave-assisted mono- or bis-annulation of dialkynyl-N-(het)arylpyrroles
作者:Philippe Pierrat、Stéphanie Hesse、Cristina Cebrián、Philippe C. Gros
DOI:10.1039/c7ob02149f
日期:——
A selective microwave-assisted mono- and bis-annulation of dialkynyl-N-(het)arylpyrrole derivatives is described. These polycyclic aromatic hydrocarbons (PAHs) have been photophysically and computationally characterized. The mono-annulated systems display interesting charge-transfer properties. By contrast, these properties vanish within the more conjugated bis-annulated compounds.
Synthesis, Characterization, and Properties of Bis-BN Ullazines
作者:Chenglong Li、Yuming Liu、Zhe Sun、Jinyun Zhang、Meiyan Liu、Chen Zhang、Qian Zhang、Hongjuan Wang、Xuguang Liu
DOI:10.1021/acs.orglett.8b00554
日期:2018.5.18
A series of bis-BN ullazine derivatives, including the parent species, were synthesized in a small number of steps from commercially available materials. X-ray crystallographic analysis revealed that bis-BN ullazines have rigid and planar frameworks. Most of the bis-BN ullazines are stable toward air and moisture. In addition, the absorption and emission bands of these ullazines are blue-shifted, compared to those of their carbonaceous ullazine analogs.
BALLI, H.;ZELLER, M., HELV. CHIM. ACTA, 1983, 66, N 7, 2135-2139