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[bmim]HSO 4 : an efficient and reusable catalyst for one-pot three-component synthesis of 2,3-dihydro-4(1 H )-quinazolinones

โœ Scribed by Darvatkar, Nitin B.; Bhilare, Sachin V.; Deorukhkar, Amol R.; Raut, Dilip G.; Salunkhe, Manikrao M.


Book ID
120994834
Publisher
Taylor and Francis Group
Year
2010
Tongue
English
Weight
137 KB
Volume
3
Category
Article
ISSN
1751-8253

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Silica sulfuric acid: an efficient and r
โœ Peyman Salehi; Minoo Dabiri; Mohammad Ali Zolfigol; Mohammad Ali Bodaghi Fard ๐Ÿ“‚ Article ๐Ÿ“… 2003 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 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