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1,3-Dibromo-5,5-dimethylhydantoin as catalyst for the conversion of aldehydes to their 1,1-diacetates (acetylals) under solvent-free and neutral conditions

โœ Scribed by Davood Azarifar; Hassan Ghasemnejad; Farhad Ramzanian-lehmali


Book ID
111730605
Publisher
Royal Society of Chemistry
Year
2005
Tongue
English
Weight
83 KB
Volume
15
Category
Article
ISSN
0959-9436

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1,3-Dibromo-5,5-dimethylhydantoin as a u
โœ Mohammad Abdollahi-Alibeik; Zahra Zaghaghi ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› Versita ๐ŸŒ English โš– 160 KB

## Abstract Efficient syntheses of 3,4-dihydropyrimidin-2-(1H)-ones and the corresponding thioxo derivatives using 1,3-dibromo-5,5-dimethylhydantoin (DBH) catalysis of a one-pot three-component Biginelli reaction of aldehydes, ethyl acetoacetate, and urea or thiourea under microwave irradiation are