Cu-catalysed direct C-H (hetero)arylation of [1,2,4]triazolo[4,3-a]pyridine has been accomplished for the first time to streamline the synthesis of 3-aryl-[1,2,4]triazolo[4,3-a]pyridines for screening blue-emitting materials. On this basis, the photophysical properties of the resulting compounds were systematically investigated, most of which exhibited excellent deep-blue emission with moderate to high quantum yields, photostability, air stability and thermal stability.
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Wu et al. (2015) studied this question.
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