Syntheses and properties of linear π-conjugated molecules composed of 1-azaazulene and azulene

Article abstract of DOI:10.1016/j.tet.2019.130658

Two compounds, 6-(1-azaazulen-2-yl)ethynylazulene (8) and 6-(2-azulenyl)ethynylazulene (10), were synthesized using the Sonogashira-Hagihara cross-coupling reaction followed by decarboxylation with concentrated phosphoric acid. Compounds 8 and 10 were cha