کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6468897 1362329 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improvement in nanocomposite host (nanocavity of dealuminated zeolite Y)-guest (12-molybdophosphoric acid) catalytic activity and its application to the one-pot three-component synthesis of tetrahydrobenzo[b]pyrans
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Improvement in nanocomposite host (nanocavity of dealuminated zeolite Y)-guest (12-molybdophosphoric acid) catalytic activity and its application to the one-pot three-component synthesis of tetrahydrobenzo[b]pyrans
چکیده انگلیسی

Zeolite Y was dealuminated by chemical methods (with ethylenediaminetetraacetic acid) to modify the zeolite structure for 12-molybdophosphoric acid (MPA) loading. MPA was encapsulated in the nanocavities of modified dealuminated zeolite Y (MDAZY) and characterized by Fourier transform infrared, X-ray diffraction, and atomic absorption spectroscopy. The new catalyst was applied for an efficient chemoselective synthesis of tetrahydrobenzo[b]pyran derivatives, and the corresponding products were obtained in good to excellent yields in very short reaction times. Furthermore, the catalytic activity of this new catalyst in the synthesis of tetrahydrobenzo[b]pyrans was compared with MPA encapsulated in zeolite Y dealuminated by the hydrothermal method. The catalyst (MPA-MDAZY) was recovered and reused several times without loss of its catalytic activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comptes Rendus Chimie - Volume 20, Issue 5, May 2017, Pages 520-525
نویسندگان
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