A novel magnetic nanoparticle supported dual acidic ionic liquid catalyst was synthesized by anchoring 3-sulfobutyl-1-(3-propyltriethoxysilane) imidazolium hydrogen sulfate onto the surface of silica-coated Fe 3 O 4 nanoparticles. Due to the combination of nano-support features and flexible imidazolium linkers, it acted as a "quasi-homogeneous" catalyst to effectively catalyze the one-pot synthesis of benzoxanthenes by a three-component condensation of dimedone with aldehyde and 2-naphthol under solvent-free conditions. More importantly, the catalyst could be easily recovered by an external magnet and reused six times without significant loss of catalytic activity.

Carbonate. -In comparison with reported procedures for sulfenylation of indoles (I), the present method is not moisture sensitive and carried out in the green solvent dimethyl carbonate. It is noteworthy that both of the sulfenyl groups of a symmetric disulfide (II) take part in the reaction.

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A novel magnetic nanoparticle-supported nano-palladium catalyst was successfully prepared via a ''click'' route. The as-prepared catalyst was well characterized and evaluated in Suzuki-Miyaura coupling in terms of activity and recyclability in aqueous ethanol. It was found to be highly efficient for the reactions of various aryl bromides with arylboronic acids under phosphine-free and low Pd loading (0.2 mol%) conditions. Moreover, the catalyst could be easily separated from the reaction system by an external magnet and reused several times without a remarkable loss of its activity.

The preparation, X-ray structure, and reactivity of new, highly soluble, and reactive iodonium ylides derived from malonate methyl ester and bearing an ortho substituent on the phenyl ring are reported. These new reagents show higher reactivity than common phenyliodonium ylides in the Rh-catalyzed cyclopropanation, C-H insertion, and transylidation reactions under homogeneous conditions.

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Copper Catalyzed Direct Alkenylation of Simple Alkanes with Styrenes. -The reaction is conducted under mild, user-friendly, and operationally simple conditions. -(ZHU, Y.; WEI*, Y.; Chem. Sci. 5 (2014) 6, 2379-2382,

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