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   nanosilica molybdic acid: synthesis, characterization and application as a green and reusable catalyst for the pechmann condensation  
   
نویسنده kiani mahtab ,karami bahador
منبع journal of the iranian chemical society - 2017 - دوره : 14 - شماره : 3 - صفحه:655 -663
چکیده    Nanosilica molybdic acid (sma nps) was founded as an efficient and recyclable nanocatalyst for the synthesis of coumarin derivatives in excellent yields with good purity. nano-sma as a new solid acid was characterized by x-ray fluorescence, x-ray diffraction, energy-dispersive x-ray analyzer, transmission electron microscopy and fourier transform infrared spectroscopy. coumarin derivatives were obtained via the pechmann condensation reaction of phenols and β-ketoesters at 80 °c under solvent-free conditions. the main advantages of the present procedure are high yields, shorter reaction time and green chemistry procedure, simple work-up and inexpensive and reusability of the catalyst.
کلیدواژه nanosilica molybdic acid ,coumarins ,pechmann condensation ,solvent-free conditions ,nanocatalyst
آدرس islamic azad university, karaj branch, young researchers and elite club, iran, yasouj university, department of chemistry, iran
 
     
   
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