Paper
RSC Advances
(Fig. 3).5c This procedure leads to almost complete removal of
carbonaceous deposits accumulated on the catalyst without
deterioration of textural structure (Table 1) and aggregation of
the silver nanoparticles (ESI†).
(k) F. G. Cirujano, A. Leyva-Perez, A. Corma and
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137.
Conclusion
The Ag/g-Al2O3 catalyst is efficient for one-pot reductive ami-
nation of aliphatic and aromatic aldehydes with nitroarenes
under continuous-ow conditions. Various secondary aromatic
amines containing alkyl, OH, OCH3, Cl, Br and C]C groups
were obtained in good to excellent yields using molecular
hydrogen as a reducing agent. The yield of secondary amine is
determined by the rate of imine formation. It was shown that
the accumulation of carbonaceous deposits on the catalyst is
the main reason of catalyst deactivation. The activity of the
spent catalyst can be restored completely aer the oxidative
treatment in air.
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Conflicts of interest
There are no conicts to declare.
Acknowledgements
The authors thank A. V. Ishchenko, E. A. Derevyannikova, Dr
A. V. Bukhtiyarov and I. A. Zharkova for their help in carrying
out this study. This work was conducted within the framework
of budget project No. 0303-2016-0006 for Boreskov Institute of
Catalysis.
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