Supported Rhodium (Rh@PS) Catalyzed Benzimidazoles Synthesis Using Ethanol/Methanol as C2H3/CH Source

An effective and stable polystyrene supported rhodium (Rh@PS) nano‐catalyst has been synthesized by following reduction‐deposition approach and applied for the selective benzimidazoles synthesis from 1,2‐phenylenediamines and ethanol/methanol as C2H3/CH source. The ethanol/methanol in the presence o...

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Veröffentlicht in:Advanced synthesis & catalysis Jg. 361; H. 1; S. 67 - 72
Hauptverfasser: Sharma, Saurabh, Sharma, Ajay, Yamini, Das, Pralay
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Heidelberg Wiley Subscription Services, Inc 11.01.2019
Schlagworte:
Catalysis
Catalysts
Chemical reduction
Chemical synthesis
Condensates
Ethanol
ethanol/methanol as alkylating agent
heterogeneous catalyst
Methanol
N-alkylation
Nitrogen heterocycles
Oxidation
Phenylenediamine
Polystyrene resins
Recovering
Recyclability
Rhodium
rhodium nanoparticles
Substrates
supported catalyst
ISSN:1615-4150, 1615-4169
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Zusammenfassung:An effective and stable polystyrene supported rhodium (Rh@PS) nano‐catalyst has been synthesized by following reduction‐deposition approach and applied for the selective benzimidazoles synthesis from 1,2‐phenylenediamines and ethanol/methanol as C2H3/CH source. The ethanol/methanol in the presence of trace amounts of aerobic oxygen under Rh@PS catalysed condition, first participated in oxidation of alcohol followed by consecutive condensation, cyclization and hydrogen elimination reactions with 1,2‐phenylenediamine gave the desired products in good yields. The Rh@PS catalyst in a single system performed both oxidation and reduction reactions in a selective/specific manner and applied for large substrate scope. Easy recovery, handling, stability, recyclability of the catalyst and less chance of metal contamination with the products are the added advantages of the process.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1615-4150
1615-4169
DOI:10.1002/adsc.201801040