Abstract
The one-pot synthesis of tetrasubstituted imidazoles by use of a series of LaxSr1 − xFeyCo1 − yO3 perovskites as catalysts is described. The La0.8Sr0.2Fe0.34Co0.66O3 nanocatalyst had the greatest activity in the heterogeneous cyclocondensation of an aldehyde, benzil, ammonium acetate, and a primary aromatic amine in water under ultrasonic irradiation. Some of the derivatives generated during this work were utilized as substrates for the synthesis in good yields of novel multifunctional tetrasubstituted imidazoles with Me3Si, C=S, and SH groups, via nucleophilic attack of tris(trimethylsilyl)methyllithium (TsiLi) at the carbon of carbon disulphide.
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