Silica Sulfuric Acid: An Efficient and Versatile Acidic Catalyst for the Rapid and Ecofriendly Synthesis of 1,3,4‐Oxadiazoles at Ambient Temperature
✍ Scribed by Dabiri, Minoo; Salehi, Peyman; Baghbanzadeh, Mostafa; Zolfigol, Mohammad Ali; Bahramnejad, Mahboobeh
- Book ID
- 120589653
- Publisher
- Taylor and Francis Group
- Year
- 2007
- Tongue
- English
- Weight
- 101 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0039-7911
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📜 SIMILAR VOLUMES
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
Trisubstituted imidazoles have been synthesized in high yields in the presence of silica sulfuric acid as a catalyst. The reaction is carried out in water, a very green solvent, under reflux conditions. The reaction work-up is simple and the catalyst is easily separated from the products by filtrati