Abstract
Silica nanoparticles/ammonium thiocyanate (nano SiO2/NH4SCN) and H3PO4 embedded on nano silica (H3PO4@nano SiO2) in the presence of NH4SCN were found to be effective systems for the thiocyanation of some arylamines and indoles to afford their corresponding thiocyanated adducts at 70°C under solvent-free conditions. The recovery and reusability of nano SiO2 as a prompting system have been investigated. A simple procedure for the synthesis of H3PO4@nano SiO2 has also been represented. In addition, a plausible mechanism of thiocyanation has also been suggested.
GRAPHICAL ABSTRACT
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Disclosure statement
No potential conflict of interest was reported by the authors.
Funding
The authors acknowledge the financial support from the Research Council of Alzahra University.