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BIFC and QFC promoted rapid and cleaner aromatization of 1,4-dihydropyridines under solvent-free condition

✍ Scribed by Vajiravelu Sivamurugan; Velayutham Murugesan; Valiyaveettil Suresh; Muthaiyahpillai Palanichamy; Ajayan Vinu

Publisher
Journal of Heterocyclic Chemistry
Year
2007
Tongue
English
Weight
310 KB
Volume
44
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

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This communication expresses aromatisation of 1,4‐dihydropyridines to pyridine derivatives with the help of alumina supported benzimidazolium fluorochromate (BIFC) and quinolinium fluorochromate (QFC) as oxidants under solvent‐free microwave irradiation. Moderate to excellent yield (80‐98%) of pyridine derivatives were achieved by this methodology.

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BIFC and QFC Promoted Rapid and Cleaner
BIFC and QFC Promoted Rapid and Cleaner Aromatization of 1,4-Dihydropyridines under Solvent-Free Condition.
✍ Vajiravelu Sivamurugan; Ajayan Vinu; Valiyaveettil Suresh; Muthaiyahpillai Palan πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons βš– 27 KB πŸ‘ 1 views

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Aromatization of 1,4-dihydropyridines in
Aromatization of 1,4-dihydropyridines in the presence of methanesulfonic acid/NaNO2/wet SiO2 under both heterogeneous and solvent free conditions
✍ Khodabakhsh Niknam; Seyed Mehdi Razavian; Mohammah Ali Zolfigol; Iraj Mohammahpo πŸ“‚ Article πŸ“… 2006 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 90 KB

## Abstract magnified image A combination of methanesulfonic acid and sodium nitrite in the presence of wet SiO~2~ was used as an effective oxidizing agent for the oxidation of 1,4‐dihydropyridines to the corresponding pyridine derivatives under mild and heterogeneous conditions in excellent yield