Facile access to 1,2-disubstituted benzimidazoles and 2,3-dihydro-1H-perimidines using a biogenically synthesized single phase δ-MnO2 NP catalyst and its dye removal study

The synthesis of single phase δ -MnO 2 NPs was carried out utilising an environmentally benign biogenic method. The prepared catalyst was utilized for benzimidazoles and dihydroperimidines synthesis and the dye removal study with exceptional catalytic activity.