An Effective and New Method for the Synthesis of Polysubstituted Imidazoles by the Use of CrCl<sub>3</sub>.6H<sub>2</sub>O as a Green and Reusable Catalyst: Synthasis of Some Novel Imidazole Derivatives
environmentally adapted synthesis of polysubstituted imidazoles in one‐pot is found. The multicomponent reaction of various aldehydes, benzil, aliphatic and aromatic primary amines and ammonium acetate under solvent‐free condition is explained. The highly efficient role of CrCl3.6H2O as catalyst in this synthesis was shown. By this advantage, several polysubstituted imidazoles as pharmaceutical important
New Conditions for the Effective Synthesis of Tri and Tetrasubstituted Imidazoles Catalysed by Recyclable Indium (III) Triflate and Magnesium Sulfate Heptahydrate
aromatic primary amines and ammonium acetate is reported for the synthesis of tri/tetra-substituted imidazoles under solvent-free conditions. Indium (III) trifluoromethanesulfonate and magnesiumsulfateheptahydrate as two highly efficient and recyclable catalysts perform a key factor to synthesis of imidazole derivatives with high yields.
Tungstate sulfuricacid (TSA) was composed of anhydrous sodium tungstate and chlorosulfonic acid with a new modified and efficient method. Catalyst was characterized by powdered X-ray diffraction (XRD), X-ray fluorescence (XRF), FT-IR spectroscopy and titration with NaOH (0.1 N). In the present study, highly efficient role of TSA as a catalyst in polysubstituted imidazoles synthesis as pharmaceuticaly