Mn/Pb-Y zeolite as an efficient catalyst for the synthesis ofspirochromene[۴,۳]oxindole derivatives

Zeolites are crystalline aluminosilicates with fully crosslinked open framework structures madeup of corner-sharing SiO۴ and AlO۴ tetrahedral [۱]. Zeolite Y-exchanged ions with Mn and Pbions was prepared and charachtrized by SEM, IR, XRD and EDX techniques.The synthesized Mn/Pb-Y Zeolite was satisfactorily catalyze the production ofspirochromene[۴,۳)oxindoles (Scheme.۱). Short reaction times, high yields of products, mild reactionconditions, the use of water as solvent, non toxicity and reusability of the catalyst are noteworthyadvantages of the current work.

کلیدواژه ها:

spiropyrazoles ، Zeolites