& Mahmood Tajbakhsh email@example.com 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 . Natural phosphate (NP) is readily available, cheap, nontoxic and a non-pollutant . NP and synthetic phosphates such as ﬂuorapatite (FAP, Ca (PO ) F ) or hydroxyapatite 10 4 6 2 (HAP, Ca (PO ) (OH) ) were used as efﬁcient catalysts for various organic 10 4 6 2 transformations, e.g. Knoevenagel condensation , transesteriﬁcation reaction , Michael addition of mercaptans to a,b-unsaturated carbonyl compounds , synthesis of 5-arylhydantoins , a-hydroxyphosphonates , and Suzuki coupling reactions . 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
Published: Jun 15, 2016
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