Natural phosphate as an efficient and green catalyst for synthesis of tetraketone and xanthene derivatives

Natural phosphate as an efficient and green catalyst for synthesis of tetraketone and xanthene... & Mahmood Tajbakhsh Department of Chemistry, Payame Noor University, P.O. Box 19395-4697, Tehran, Iran Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar 47416-95447, Iran Department of Medicinal Chemistry, Pharmaceutical Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran 123 30 A. Fallah et al. Keywords Heterogeneous catalyst  Natural phosphate  Fluorapatite Tetraketone  Xanthene Introduction Solid catalysts are known as new alternatives to replace homogeneous catalysts due to advantages including less corrosive action, being easier to handle and separate, as well as being reusable and generating less amount of toxic wastes [1]. Natural phosphate (NP) is readily available, cheap, nontoxic and a non-pollutant [2]. NP and synthetic phosphates such as fluorapatite (FAP, Ca (PO ) F ) or hydroxyapatite 10 4 6 2 (HAP, Ca (PO ) (OH) )[3] were used as efficient catalysts for various organic 10 4 6 2 transformations, e.g. Knoevenagel condensation [4], transesterification reaction [5], Michael addition of mercaptans to a,b-unsaturated carbonyl compounds [6], synthesis of 5-arylhydantoins [7], a-hydroxyphosphonates [8], and Suzuki coupling reactions [9]. Tetraketone and xanthene derivatives are important classes of oxygen-containing heterocyclic compounds that have gained much attention owing to their numerous applications. They have exhibited Research on Chemical Intermediates Springer Journals

Natural phosphate as an efficient and green catalyst for synthesis of tetraketone and xanthene derivatives

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Springer Netherlands
Copyright © 2016 by Springer Science+Business Media Dordrecht
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
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