Synthesis and thermal properties of novel calix[4]arene derivatives containing 1,2,3-triazole moiety via K2CO3-catalyzed 1,3-dipolar cycloaddition reaction

Two calix[4]arene derivatives containing 1,2,3-triazole moiety were synthesized via K₂CO₃-catalyzed 1,3-dipolar cycloaddition reaction between calix[4]arene-based azide and active methylene compounds in good yields. The structures of the two compounds synthesized herein were fully confirmed by ¹H NMR, ¹³C NMR, and MS (ESI). The thermal analysis showed that the mass losses of the synthesized compounds 4 and 5 containing 1,2,3-triazole groups are similar to each other.