Syntheses of flavones from Diels-Alder reactions of 2-styrylchromones withortho-benzoquinodimethanes

Citation
Ams. Silva et al., Syntheses of flavones from Diels-Alder reactions of 2-styrylchromones withortho-benzoquinodimethanes, EUR J ORG C, (1), 1999, pp. 135-139
Citations number
40
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
ISSN journal
1434-193X → ACNP
Issue
1
Year of publication
1999
Pages
135 - 139
Database
ISI
SICI code
1434-193X(199901):1<135:SOFFDR>2.0.ZU;2-G
Abstract
The first reported cycloaddition reactions of 2-styryl-chromones with ortho -benzoquinodimethane afforded 2-[2-(3-aryl-1,2,3,4-tetrahydronaphthyl)]chro mones. These cycloadducts were converted into the corresponding 2-[2-(3-ary lnaphthyl)]chromones (benzoflavone derivatives) by bromination/dehydrobromi nation processes. These benzoflavone derivatives were also obtained in one- pot cycloaddition reactions of 2-styrylchromones with ortho-benzoquinodibro momethane.