Research Article

Synthesis, Characterization, and Application of Poly(N,N′-dibromo-N-ethylnaphthyl-2,7-disulfonamide) as an Efficient Reagent for the Synthesis of 2-Arylbenzimidazole and 2-Aryl-1-arylmethyl-1H-1,3-benzimidazole Derivatives

Table 2

Synthesis of 1,2-disubstituted benzimidazoles in the presence of PBNS.

EntryOPDAldehydeProductaTime (min)Yield (%)bM. P. (°C)
M. P. (°C)

16590130–132 [18]131–133

27582119-120 [19]119–121

38077167-168 [20]170–172

48080135–137 [18]136–138

59595190–192 [18]187–189

67075129–131 [18]128–130

All products were identified by their IR and 1H NMR spectra.
bIsolated yields.