Approaches for the introduction of fluorinated substituents into [1,2,3]Triazolo[1,5-a]pyridines
摘要:
[1,2,3]Triazolo[1,5-a]pyridines functionalization with a trifluoromethyl group has been achieved for the first time using different synthetic strategies. Furthermore, these scaffolds have been employed as starting material in the synthesis of new 2,6-disubstituted pyridines containing the trifluoromethyl group, compounds that are not available using other methodologies. A fluorine-mediated triazolopyridine dimerisation is described, improving the previously known synthetic method. Preliminary studies focused on exploring triazolopyridines reactivity with electrophilic fluorine have revealed a new approach for the obtainment of imidazopyridines. (C) 2014 Elsevier B.V. All rights reserved.
Triazolopyridines. Part 25: Synthesis of new chiral ligands from [1,2,3]triazolo[1,5-a]pyridines
作者:Belén Abarca、Rafael Ballesteros、Rafael Ballesteros-Garrido、Françoise Colobert、Frédéric R. Leroux
DOI:10.1016/j.tet.2007.07.101
日期:2007.10
The synthesis of new chiral triazolopyridine ligands possessing fluorescent properties is described. The triazolo ringopening was studied in order to obtain new chiral 2,6-disubstituted pyridines. A preliminary coordination assay with Zn(II) is also presented.