319432-30-9Relevant academic research and scientific papers
Novel bipyrazolo[1,5-: A] pyridine luminogens with aggregation-induced emission enhancement properties
Hsiao, Pu-Yen,Chu, Jean-Ho
supporting information, p. 12281 - 12284 (2021/11/30)
A novel 3,3′-bipyrazolo[1,5-a]pyridine molecular scaffold was obtained as a product of serendipity. Both photophysical characterisations and HOMO-LUMO theoretical calculations indicate its potential as a promising fluorophore with notable intramolecular charge transfer. Nonetheless, the emission properties of this compound suffer from the typical aggregation-caused quenching effect. To overcome this situation, we introduced additional diaryl groups onto the skeleton and synthesised a series of 7,7′-diaryl-3,3′-bipyrazolo[1,5-a]pyridines via palladium-catalysed intermolecular C-H/C-H bond cross-coupling reaction in 35-62% yields. This series of tailor-made luminogens with twisted π-structures display aggregation-induced emission enhancement properties.
Effective and variable functionalization of pyrazolo[1,5-a]pyridines involving palladium-catalyzed coupling reactions
Aboul-Fadl,Lober,Gmeiner
, p. 1727 - 1732 (2007/10/03)
Various 7-substituted pyrazolo[1,5-a]pyridines were synthesized by palladium-mediated cross-coupling reactions. Starting from the corresponding 7-iodo derivatives, incorporation of phenyl, vinyl, ethynyl, cyano, and amino was accomplished. Pyrazolo[1,5-a]
