Synthesis of dithiocarbamates by the one-pot three-component Markovnikov addition reaction of an amine, carbon disulfide and an alkyl vinyl ether or N -vinylpyrrolidone is reported in polyethylene glycol (PEG) under a mild and green procedure with high yields and completely regiospecific. Also, the products were used as efficient starting materials for amidoalkylation of electron-rich arenes such as naphthols and indoles. ]]>

Aryl halides and especially inactive aryl chlorides were coupled to benzenoid aromatic rings in a Suzuki–Miyaura coupling reaction in the absence of organic solvents and toxic phosphine ligands. The reaction was catalysed by a recoverable magnetic nanocatalyst, Pd@Fe3O4, in aqueous media. This method is green, and the catalyst is easily removed from the reaction media using an external magnetic field and can be re‐used at least 10 times without any considerable loss in its activity. The catalyst was characterized using scanning and transmission electron microscopies, thermogravimetric analysis, inductively coupled plasma spectroscopy, Fourier transform infrared spectroscopy, CHN analysis, X‐ray diffraction and vibrating sample magnetometry.

Carbonyl compounds were prepared by selective oxidation of alcohols in the presence of recoverable Fe 3 O 4 @SiO 2 @Pd magnetic nanocatalyst in aqueous media as a green solvent. Molecular oxygen served as an oxidant. The catalyst was removed from the reaction media by external magnetic field, washed with methanol, and reused for six more times without any considerable reduction in its reactivity. The chemoselectivity and regioselectivity of the catalyst can serve for selective oxidation of primary alcohols in the presence of secondary ones, and for oxidation of unhindered alcohols in the presence of hindered ones.

We report the synthesis of recoverable magnetic nano catalyst Pd@ Fe 3 O 4 and its utility as a recyclable catalyst for reduction of nitro group. The catalyst is easily removed from the reaction media by an external magnetic field and can be re-used for at least 10 times without any considerable loss in its activity. The catalyst was characterized by scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), inductively coupled plasma spectroscopy (ICP), Fourier transform infrared spectroscopy (FTIR), CHN analysis, and vibrating sample magnetometery (VSM).