Abstract
In green catalyst systems, both the catalyst and the technique should be environmentally safe. In this study we designed a green palladium(II) catalyst for microwave-assisted Suzuki [Formula presented] coupling reactions. The catalyst support was produced from biopolymers; chitosan and cellulose. The catalytic activity of the catalyst was tested on 16 substrates in solvent-free media and compared with those of commercial palladium salts. Reusability tests were done. The catalyst was also used in conventional reflux-heating system to demonstrate the efficiency of microwave heating method. We recorded high activity, selectivity and excellent TONs (6600) and TOFs (82500) just using a small catalyst loading (1.5 × 10−3 mol%) in short reaction time (5 min). The catalyst exhibited a long lifetime (9 runs). The findings indicated that both green chitosan/cellulose-Pd(II) catalyst and the microwave heating are suitable for synthesis of biaryl compounds by using Suzuki [Formula presented] coupling reactions.
Original language | English |
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Pages (from-to) | 181-188 |
Number of pages | 8 |
Journal | Carbohydrate Polymers |
Volume | 152 |
DOIs | |
Publication status | Published - 5 Nov 2016 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 Elsevier Ltd
Keywords
- Glyoxal
- Microwave
- Schiff base
- Suzuki coupling