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Abstract: A supported ionic liquid ILCF3SO3@SiO2 was synthesized and used as a highly efficient catalyst in the Paal-Knorr reaction for the preparation of pyrroles. The heterogeneous catalyst could be easily recovered and recycled for five times without noticeable loss of catalytic activity. Also a possible reaction mechanism is provided.Graphical Abstract: [ABSTRACT FROM AUTHOR]

A series of silica-supported functionalized ionic liquids catalysts have been prepared and tested in the oxidative conversion of alcohols to nitriles with HO as the oxidant. The features of this heterogeneous reaction system were studied by tuning various reaction parameters including catalyst selection, amount of the catalyst, and effect of solvents. Among the catalysts, FeCl-IL-SiO exhibited the highest efficiency in direct oxidation of alcohols to nitriles under the optimized condition along with good recycle performance. Also, a possible catalytic mechanism is provided. Graphical abstract: [ABSTRACT FROM AUTHOR]

A simple, efficient, and eco-friendly procedure for the epoxidation of alkenes to epoxides with HO catalyzed by Co(OAc) in ionic liquid [Cpy][PF] has been developed. The reactions were carried out with alkene, Co(OAc) (0.1 mmol), [Cpy][PF] (10 mL), and HO (30 %, 11 mmol) at room temperature for 2-6 h. This atom-economical protocol affords the target products in good to high yields (88-98 %). The products can be separated by a simple extraction with organic solvent, and the catalytic system can be recycled and reused without loss of catalytic activity. Graphical abstract: A simple, efficient, and eco-friendly procedure for the epoxidation of alkenes to epoxides with HO catalyzed by Co(OAc) in ionic liquid [Cpy][PF] has been developed.[Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]

A simple and efficient method for the oxidation of primary and secondary alcohols to the corresponding aldehydes and ketones with HO/(NH4)MoO4HO using the PEG-DIL/methylcyclohexane temperature-dependent biphasic system has been developed. The product can be easily isolated by a simple decantation, and the catalytic system can be recycled or reused without loss of catalytic activity. Graphical Abstract: [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]

A concise, efficient method to sulfonyl quinones and sulfonyl-1,4-diols through Ir-catalyzed C-S coupling of quinones with sulfonyl chloride has been developed. Thus, this methodology proves its value as a versatile synthetic tool for a broad range of sulfonyl quinones, producing good to excellent yields. Graphical Abstract: [ABSTRACT FROM AUTHOR]