Pd nanoparticles Incarcerated in Aluminium Oxy-Hydroxide: An Efficient and Recyclable Heterogeneous Catalyst for Selective Knoevenagel Condensation
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Dosyalar
Tarih
2017
Yazarlar
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Yayıncı
Wiley-V C H Verlag Gmbh
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Knoevenagel condensation between aryl aldehyde derivatives with malononitrile was successfully achieved using commer-cially available Pd/AlO(OH) nanoparticles (0.5 wt% Pd) in an aqueous medium. All benzylidenemalononitrile (BMN) deriva-tives were obtained promptly (8-60 min) with high selectivity and yields of over 99% in a mixture of H2O/MeOH (v/v= 1/2) at room temperature. Moreover, when benzoyl chloride deriva-tives were utilized instead of aryl aldehyde derivatives, medium amounts of the expected products were yielded. Before the reaction and after five reuses, characterization of the Pd/AlO(OH) nanoparticles was carried out via X-ray diffraction and scanning electron microscopy analysis. The BMN derivative characterization was accomplished using the (HNMR)-H-1 and (CNMR)-C-13 spectra. In order to optimize the reaction conditions, the parametric effects of the solvent type and catalyst amount were examined. Consequently, the PdAlO(OH) NPs were used for the first time in the Knoevenagel condensation. A novel, practical and eco-friendly process was developed for Knoevenagel condensation in the presence of Pd/AlO(OH) nanoparticles.
Açıklama
WOS: 000395434600064
Anahtar Kelimeler
Kaynak
Chemistryselect
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
2
Sayı
1