Journal
GREEN CHEMISTRY
Volume 15, Issue 12, Pages 3421-3428Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3gc41179f
Keywords
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Funding
- CSIR, New Delhi as part of XII Five Year plan programme under title ORIGIN [CSC-0108]
- Department of Science & Technology (Nano Mission), New Delhi [SR/NM/NS-95/2009]
- CSIR New Delhi
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Solid supported platinum(0) (SS-Pt) nanoparticles were developed as a heterogeneous catalyst following a reduction/deposition method and characterized by SEM, TEM, EDX and XRD analysis. The SS-Pt catalyst was applied in the chemo-selective reduction of nitroarenes to N-arylhydroxylamines using hydrazine hydrate as a hydrogen source. A wide variety of reducible functional groups such as halides, carboxylic acids, esters, amides, nitriles, keto, alkenes, alkynes and N-benzyl were well tolerated under the reaction conditions. This process was further successfully employed in 10 g scale reactions. N-Arylhydroxylamines were further applied for catalyst free synthesis of azoxybenzenes. Moreover, use of PEG-400 as cheap reaction medium, additive free methodology and the recyclability of SS-Pt catalyst up to ten times without significant loss of catalytic activity evidently follow the principles of green chemistry.
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