Nanosilica-bonded N-(propylsulfonyl) piperazine-N-sulfamic acid was easily prepared by functionalizing silica nanoparticles and characterized by thermogravimetric analysis, scanning electron microscopy, infrared (IR) spectroscopy, elemental analyses, and ion-exchange pH analysis. The catalytic activity of the functionalized nanosilica for preparation of 1,1′-(arylmethylene) diureas from reaction of aldehydes with urea derivatives was examined. The efficient effect of this catalyst led to preparation of 1,1′-(arylmethylene) diureas in high yield. The reaction of aldehydes with thiourea under the same reaction conditions afforded high yield of 1,3,5-triazinane-2,4-dithiones. Catalyst reusability, simple workup procedure, and short reaction time are other advantages of this protocol.
Research on Chemical Intermediates – Springer Journals
Published: Jul 27, 2016
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