1Department of Chemistry, Payame Noor University, Qazvin, Iran
2bDepartment of Chemistry, Faculty of Science, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran
3Department of Chemistry, Payame Noor University, PO BOX 19395-3697, Tehran, I. R. of Iran Tel.: 0098-28-33224024; Fax number: 0098-28-33226400
4Department of Chemistry, Takestan Branch, Islamic Azad University, Takestan, Iran
Al-MCM-41 nanoreactors is found to be a remarkable efficient catalyst for one-pot multicomponent cyclocondensation of benzil, aniline or ammonium acetate and aromatic aldehydes for the synthesis of polysubstituted imidazoles under solvent-free conditions. The reaction was efficiently promoted by 10 mg nano-Al-MCM-41 and the heterogeneous catalyst was recycled for four runs in this reaction without losing its catalytic activity. The key advantages of this process are operational simplicity, reusable catalyst, shorter reaction time, convenient work-up procedures, avoiding the use of organic solvents and purification of products by non-chromatographic methods. By this advantage, several polysubstituted imidazoles as pharmaceutical important molecules can be prepared in high yield and high purity.