Cobalt supported on alumina as green catalyst for Biginelli reaction in mild conditions: effect of catalyst preparation method
Cobalt supported on alumina (10 wt% Co/Al2O3) was synthesized by three different methods; sol-gel (SG), microemulsion (ME) and impregnation (IMP). The materials were characterized by the Brunauer-Emmett-Teller (BET) method, X-ray diffraction (XRD), X-ray fluorescence, scanning electron microscopy (S...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2017-11-01
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| Series: | Green Processing and Synthesis |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/gps-2016-0149 |
| Summary: | Cobalt supported on alumina (10 wt% Co/Al2O3) was synthesized by three different methods; sol-gel (SG), microemulsion (ME) and impregnation (IMP). The materials were characterized by the Brunauer-Emmett-Teller (BET) method, X-ray diffraction (XRD), X-ray fluorescence, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis. Their catalytic activity was investigated toward the formation of Biginelli reaction products, 3,4-dihydropyrimidin(1H)-ones (DHPMs). The catalysts were found to be efficient for this reaction with yields between 50% and 71% and can be reused without great loss of efficiency. Among the catalytic systems, that prepared by the SG method is the most active with 71% of DHPMs yield under solvent free conditions at 100°C for 1 h of reaction time. |
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| ISSN: | 2191-9542 2191-9550 |