کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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50515 | 46800 | 2011 | 5 صفحه PDF | دانلود رایگان |
Zirconium modified silica gel was prepared by the grafting method and the resulting organic–inorganic hybrid material was found to be a highly effective catalyst for the range of organic transformations such as syntheses of coumarins, quinoxalines and 2,4,5-trisubstituted imidazoles. The low percentage of zirconium in the catalyst gave products in high turnover numbers; the catalyst was recovered after reaction, and reused. The structure of the catalyst was investigated and confirmed by surface area (BET), FT-IR, ED-XRF and elemental analyses, 13C-CPMAS spectral studies, molecular mechanics studies and inductively coupled plasma mass spectrometry technique (ICP-MS).
Graphical AbstractSilica-supported zirconium complex has been found to be an efficient and recyclable catalyst for the synthesis of a number of biologically important molecules in high turnover numbers and rates. Figure optionsDownload as PowerPoint slideResearch Highlights
► Synthesis of zirconium modified silica gel using the grafting method.
► Characterization and application of organic–inorganic hybrid material in catalysis.
► Recyclable and efficient catalyst.
► Synthesis of coumarins, quinoxalines and imidazole derivates in high TONs.
Journal: Catalysis Communications - Volume 12, Issue 5, 5 January 2011, Pages 327–331