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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Published in:Advanced synthesis & catalysis Vol. 361; no. 1; pp. 67 - 72
Main Authors: Sharma, Saurabh, Sharma, Ajay, Yamini, Das, Pralay
Format: Journal Article
Language:English
Published: Heidelberg Wiley Subscription Services, Inc 11.01.2019
Subjects:
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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Abstract 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.
AbstractList 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.
Author Sharma, Saurabh
Das, Pralay
Sharma, Ajay
Yamini
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  surname: Das
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  email: pdas@ihbt.res.in, pralaydas1976@gmail.com
  organization: Academy of Scientific & Innovative Research (AcSIR)
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Snippet An effective and stable polystyrene supported rhodium (Rh@PS) nano‐catalyst has been synthesized by following reduction‐deposition approach and applied for the...
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SubjectTerms 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
Title Supported Rhodium (Rh@PS) Catalyzed Benzimidazoles Synthesis Using Ethanol/Methanol as C2H3/CH Source
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