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1,3-Dibromo-5,5-dimethylhydantoin, a useful reagent for aromatic bromination

✍ Scribed by Christophe Chassaing; Arnaud Haudrechy; Yves Langlois

Book ID
104257302
Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
119 KB
Volume
38
Category
Article
ISSN
0040-4039

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✦ Synopsis

1,3-dibromo-5.5-dimethylhydantoin (DBDMH) is a useful and easy to handle reagent for bromination of various aromatic derivatives substituted with electron donating groups. In the presence of trimethylsilyltrifluoromethanesulfonate, DBDMH showed increased reactivity, and in one case, the reaction followed another pathway, suggesting an alternative mechanism.

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1,3-Dibromo-5,5-dimethylhydantoin as a useful reagent for efficient synthesis of 3,4-dihydropyrimidin-2-(1H)-ones under solvent-free conditions
✍ Mohammad Abdollahi-Alibeik; Zahra Zaghaghi πŸ“‚ Article πŸ“… 2009 πŸ› Versita 🌐 English βš– 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