Scheme 3.
Synthesis of novel benzimidazole and indole derivatives with N-1 substituted 1,2,3-triazole. Reagents and conditions: (i) propargyl bromide, NaH, DMF, Ar atmosphere, 60 °C, 24 h; (ii) corresponding azide, Cu, 1 M CuSO4 solution, tert-butanol: H2O = 1: 1, MW 300 W, 80 °C, 45 min.