Facile and efficient synthesis of 2,4,5-triarylimidazoles has been achieved by employing three-component one-pot reaction using aromatic aldehydes, benzil and NH4OAc in the presence of Co doped ZnS nanoparticles in water under ultrasonic irradiation. Doping of Co promotes the activity and selectivity of ZnS nanoparticles indicated by high TOF value. The protocol offers advantages in terms of higher yields, short reaction times, and mild reaction conditions, with reusability of the catalyst.
Key words: Aqueous medium, Co doped ZnS nanoparticles, Heterogeneous catalyst, 2,4,5-triaryl-1H-imidazoles
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