1357284-44-6Relevant articles and documents
Synthesis and structure of oxacalix[2]arene[2]triazines of an expanded π-electron-deficient cavity and their interactions with anions
Li, Sen,Fa, Shi-Xin,Wang, Qi-Qiang,Wang, De-Xian,Wang, Mei-Xiang
supporting information; scheme or table, p. 1860 - 1867 (2012/04/23)
Novel macrocyclic anion receptors based on the principle of anion-π interactions were reported. By means of both post-macrocyclization modification protocol and the stepwise fragment coupling approach, functionalized oxacalix[2]arene[2]triazines bearing two other electron-deficient (hetero)aromatic rings on the lower rim were efficiently synthesized. The resulting oxacalix[2]arene[2]triazine macrocyclesadopt 1,3-alternate conformation, yielding therefore an expanded electron-deficient cavity or space consisting of two triazine rings and two appending aromatic rings. Spectroscopic titration study showed the selective interaction of the pentafluorophenyl- substituted oxacalix[2]arene[2]triazine with azide and fluoride in solution with the binding constants (K1:1) ranging from 1.33 × 10 3 to 3.52 × 103 M-1.