Journal
RSC ADVANCES
Volume 11, Issue 54, Pages 33980-33989Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ra05190c
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- Dr Babasaheb Ambedkar Marathwada University, Aurangabad (MS), India [STAT/VI/RG/DEPT/2019-20/337-38]
- UGC-DST SAP
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A solid catalyst named Cs-3 was synthesized using a simple, cheap, clean, and eco-friendly method. It was found to be highly active and reusable for the synthesis of uracil derivatives under solvent-free conditions.
A solid catalyst, cesium salt of 2-molybdo-10-tungstophosphoric acid (Cs2.3H0.7PW10Mo2O40) named as Cs-3, was synthesized by a simple, cheap, clean, and eco-friendly method. The physicochemical properties of the synthesized catalyst were studied via FTIR spectroscopy, XRD, EDX, ICP-AES, SEM-TEM, and BET techniques. The precursor 2-molybdo-10-tungstophosphoric acid (H3PW10Mo2O40) was easily soluble in water and other polar solvents. Moreover, their cesium salts CsxH3-xPW10Mo2 with Cs content in the range x = 2.0-2.5 were insoluble in water and other polar solvents. The surface area of the precursor (5.483 m(2) g(-1)) increased after partial proton exchange by Cs+ ions (111.732 m(2) g(-1)), and all samples with x > 1 were resistant to leaching of active components and can be recycled without obvious loss of activity. This catalyst used for the synthesis of uracil derivatives via a green route under solvent free conditions at 70 degrees C gives higher yield within a shorter reaction time. The catalyst was found to be more active and reusable over nine runs with a negligible loss of activity.
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