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Sulfuric Acid Immobilized on Silica Gel as Highly Efficient and Heterogeneous Catalyst for the One-Pot Synthesis of 2,4,5-Triaryl-1H-imidazoles

✍ Scribed by Maleki, Behrooz; Keshvari Shirvan, Hossein; Taimazi, Fereshteh; Akbarzadeh, Elahe


Book ID
120028947
Publisher
Scientific Research Publishing
Year
2012
Weight
155 KB
Volume
02
Category
Article
ISSN
2161-4687

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Silica sulfuric acid: an efficient and r
✍ Peyman Salehi; Minoo Dabiri; Mohammad Ali Zolfigol; Mohammad Ali Bodaghi Fard πŸ“‚ Article πŸ“… 2003 πŸ› Elsevier Science 🌐 French βš– 91 KB

Silica sulfuric acid efficiently catalyzes the three-component Biginelli reaction between an aldehyde, a b-dicarbonyl compound and urea or thiourea in refluxing ethanol to afford the corresponding dihydropyrimidinones in high yields. The catalyst is reusable and can be applied several times without