Synthesis of 2,6-Bis(oxazolyl)pyridine Ligands for Luminescent LnIII Complexes

[摘要]：New bis(oxazolyl)pyridine ligands for LnIII ions were prepared by using an expeditious methodology from threonine and dipicolinic chloride. The synthetic strategy includes a dehydration step to give a bis(dehydroaminobutyric acid) derivative followed by bromination and cyclization with DBU. Photophysical studies of EuIII and TbIII complexes of these ligands showed that the 2,6-bis(oxazolyl)pyridine moiety acts as an effective sensitizer for lanthanide luminescence and indicate the formation of 3:1 complexes [Ln{bis(oxazole)pyridine}3]3+.

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