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This study focuses on covalent grafting of Fe3O4 magnetic nanoparticles (MNPs) to graphene oxide nanosheets (GNOS) via three different chemical routes.

In this research article, brønsted acidic dicationic ionic liquid immobilized on silica-coated iron oxide support and its catalytic activity was investigated in the synthesis of bispyrazol-5-ols under solvent-free conditions. The prepared catalyst was characterized by different analytical tools such as XRD, FT-IR, TGA, TEM, and SEM techniques. The catalyst can be recycled at least five times with the remaining of its catalytic activity. The easy recovery, reusability, and excellent activity of the catalyst as well as easy workup are other remarkable advantages of this method.

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P2O5 as dehydrating reagent can be used for the acetalization of carbonyl compounds. The reaction is very fast and proceeds within 1-2 minutes. -(MIRJALILI*, B. F.; ZOLFIGOL, M. A.; BAMONIRI, A.; AMROLLAHI, M. A.; HAZAR, A.; Phosphorus, Sulfur Silicon Relat. Elem. 179 (2004) 7, 1397-1401; Dep. Chem., Coll. Sci., Yazd Univ., Yazd 89195, Iran; Eng.) -M. Paetzel 51-056

Protection O 0345 A Green Protocol for Chemoselective O-Acylation in the Presence of Zinc Oxide as a Heterogeneous, Reusable and Eco-Friendly Catalyst. -A series of 14 alcohols and 3 phenols is acylated efficiently under mild and solvent-free conditions using zinc oxide as a cheap and reusable catalyst. Competing experiments show that alcohols are acylated selectively in the presence of phenols and primary alcohols in the presence of secondary ones. -(TAMADDON*, F.; AMROLLAHI, M. A.; SHARAFAT, L.; Tetrahedron Lett. 46 (2005) 45, 7841-7844; Dep. Chem., Coll. Sci., Yazd Univ., Yazd 89195, Iran; Eng.) -Roy 07-057