Green heterogeneous Pd(II) catalyst produced from chitosan-cellulose micro beads for green synthesis of biaryls. (5th November 2016)

• Record Type: Journal Article
• Authors: Baran, Talat; Sargin, Idris; Kaya, Murat; Menteş, Ayfer
• Is Part Of: Carbohydrate polymers. Volume 152(2016)
• Page Start: 181
• Page End: 188
• Publication Date: 2016-11-05
• Subjects: Suzuki coupling -- Glyoxal -- Schiff base -- Microwave; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2016.06.103
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: Green catalysis system consisting of biopolymer based heterogeneous Pd(II)-catalyst. High TONs (6600) and TOFs (82500) recorded for green chitosan/cellulose-Pd(II) catalyst. This green catalyst exhibited a better performance in Suzuki coupling reactions. 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 CC 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 CC coupling reactions.