A green method for solvent-free conversion of epoxides to thiiranes using NH4SCN in the presence of NiFe2O4 and MgFe2O4 magnetic nanocatalysts

Nickel and magnesium ferrite magnetic nanoparticles were fabricated and applied as efficient and reusable catalysts in the solvent-free conversion of various epoxides to the corresponding thiiranes with ammonium thiocyanate under oil bath (60°C) conditions. NiFe₂O₄ and MgFe₂O₄ nanoparticles can catalyze the reactions at short times in high to excellent yields. The catalysts can also be recovered easily using an external magnetic field and be reused four times without any significant loss of activity.     

Preparation and characterization of α-tocopherol nanocapsules based on gum Arabic-stabilized nanoemulsions

Food Science and Biotechnology - The preparation of water dispersed α-tocopherol nanocapsules through solvent-displacement technique using gum Arabic (GA) as natural stabilizing and...     

Magnetically separable nano CuFe2O4: an efficient and reusable heterogeneous catalyst for the green synthesis of thiiranes from epoxides with thiourea

The magnetically separable nano CuFe₂O₄ was prepared and used as an efficient heterogeneous catalyst for conversion of various epoxides to the corresponding thiiranes with thiourea in refluxing ethanol. The reactions were completed within 34?45 min to give thiiranes in 80?95% yields. The utilized nano CuFe₂O₄ can be reused for several times without losing its activity.