Preparation and Catalytic Properties of Various Oxides and Mesoporous Materials Containing Niobium and Sulfate Ions, in the Etherification Reaction of 2-Naphtol
Preparation and Catalytic Properties of Various Oxides and Mesoporous Materials Containing Niobium and Sulfate Ions, in the Etherification Reaction of 2-Naphtol作者机构：Laboratoire de Chimie de Coordination Inorganique et Organométallique (LCIO) Université Libanaise Faculté des Sciences I Hadath Liban Ecole Doctorale des Sciences et Technologie EDST PRASE Université Libanaise Hadath Liban Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS) UMR 5246 CNRS Université Claude Bernard Lyon 1 Villeurbanne France
出 版 物：《International Journal of Organic Chemistry》 (有机化学国际期刊（英文）)
年 卷 期：2018年第8卷第1期
页 面：16-40页
主 题：Sulfated Oxides Mesoporous Materials Niobium Solid Acid Catalysis Etherification
摘 要：Several types of solid acid catalysts were prepared based on oxides like (ZrO2, TiO2, HfO2, MCM-41 and SBA-15), using two main preparation methods: the precipitation and the sol-gel methods. Each catalyst was subjected to two types of impregnations: sulfate ions using sulfuric acid as precursor and niobium using niobium oxalate as precursor. These prepared catalysts were tested in the etherification reaction of 2-naphtol, where the catalysts showed both acidic and redox properties. The acidic character was manifested through the formation of 2-butoxynaphtalene (with moderate yields) when oxide is sulfated, and the redox character (when impregnated with niobium) manifested through the formation of the interesting product 2-ethylnaphtofuran (with low yields) and other products that were a result of oxidative coupling of two 2-naphtol molecules (binol and acetal of binol). However despite the effort, several attempts to increase the yield of 2-ethylnaphtofuran did not work. All products prepared were obtained in pure form and characterized by 1H and 13C NMR, GC and MS.
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