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A Fe3O4/SiO2/PATL/MnO2 core/shell nanocomposite was synthesized via an ultrasound-assisted method and its catalytic activity for the aerobic oxidation of alcohols to aldehydes and ketones was evaluated .

An efficient and convenient protocol for the synthesis of novel bis[spiro(quinazoline-oxindole)] derivatives by one-pot pseudo five-component condensation of two molecules of isatoic anhydride, two molecules of isatins, and diamines in high yields and very short reaction time is described. This green protocol was catalyzed by Alum as a non-toxic, reusable, inexpensive, and easily available reagent.

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Benzothiazole derivatives are essential intermediates in synthesizing a wide variety of medical and pharmaceutical compounds, and there is a great demand for a simple and efficient method to synthesize benzothiazoles under mild reaction conditions. Organic electrosynthesis as an energy-efficient process represents an environmentally benign and safer method than traditional methods for organic synthesis. Herein, we present bromine-free and straightforward synthesis of 2-amino benzothiazole derivatives via the reaction of aniline derivatives and ammonium thiocyanate using electrosynthesis in the presence of sodium bromide both as an electrolyte and as a brominating agent at room temperature in isopropyl alcohol (i-PrOH) as a solvent. The reaction of ammonium thiocyanate via C–H thiolation routes, using various aniline derivatives, resulted in a simple, green, and bromine-free synthesis of 2-amino benzothiazole in moderate to good yields under mild reaction conditions. Riluzole drug can be produced using the same procedure in moderate yields.