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A nano silver-xerogel (Ag nps@modified TEOS) as a newly developed nanocatalyst in the synthesis of benzopyranopyrimidines (with secondary and primary amines) and gem-bisamides

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Abstract

Silver nanoparticles have been prepared from a chemical reduction approach and supported on modified TEOS (tetraethylorthosilicate) xerogels to be studied as a nanocatalyst in the conversions of benzopyranopyrimidines (with primary as well as secondary amines along with the mechanism by trapping the imine intermediate) and also in the synthesis of gem-bisamides. Different conditions for the performance of the nanocatalyst have been screened and tolerance with respect to variable functionalities has been observed, resulting in excellent yields; and confirmation of products synthesized has been done using studies like 1H NMR, 13C NMR and mass analysis. Also, SEM-EDX and TEM of the nanocatalyst have been performed to know the internal and external morphology, size and elemental composition. UV and XRD analysis to confirm the silver nanoparticles’ and xerogel's presence, TGA to study the thermal stability and FTIR to study the modification pattern of the nanocatalyst have been undertaken and presented in this work.

Graphical abstract: A nano silver-xerogel (Ag nps@modified TEOS) as a newly developed nanocatalyst in the synthesis of benzopyranopyrimidines (with secondary and primary amines) and gem-bisamides

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Publication details

The article was received on 07 Mar 2017, accepted on 12 Apr 2017 and first published on 18 May 2017


Article type: Paper
DOI: 10.1039/C7DT00822H
Citation: Dalton Trans., 2017, Advance Article
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    A nano silver-xerogel (Ag nps@modified TEOS) as a newly developed nanocatalyst in the synthesis of benzopyranopyrimidines (with secondary and primary amines) and gem-bisamides

    G. Kour and M. Gupta, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT00822H

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