title: Green heterogeneous Pd(II) catalyst produced from chitosan-cellulose micro beads for green synthesis of biaryls.
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 (5min). 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.
authors: Department of Chemistry, Faculty of Science and Letters, Aksaray University, Aksaray, 68100 Aksaray, Turkey. Electronic address: talatbaran_66@hotmail.com.
authors: Talat
authors: T
authors: Baran
authors: Department of Biotechnology and Molecular Biology, Faculty of Science and Letters, Aksaray University, 68100 Aksaray, Turkey.
authors: Idris
authors: I
authors: Sargin
authors: Department of Biotechnology and Molecular Biology, Faculty of Science and Letters, Aksaray University, 68100 Aksaray, Turkey.
authors: Murat
authors: M
authors: Kaya
authors: Department of Chemistry, Faculty of Science and Letters, Aksaray University, Aksaray, 68100 Aksaray, Turkey.
authors: Ayfer
authors: A
authors: Menteş
mesh_terms: D002384:Catalysis; D002482:Cellulose / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D008863:Microspheres; D008872:Microwaves; D010165:Palladium / Q000737:chemistry*
chemical_list: D010165:Palladium; D002482:Cellulose; D048271:Chitosan
keywords: Glyoxal; Microwave; Schiff base; Suzuki coupling