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2′-Hydroxyflavylium: introducing flavanones into the flavylium network of chemical reactions
- Source :
-
Tetrahedron . Jan2008, Vol. 64 Issue 4, p714-720. 7p. - Publication Year :
- 2008
-
Abstract
- Abstract: Chalcones possessing a hydroxyl group in position 2 cyclize to form flavylium salts in acidic media, this reaction being reversible under neutral–basic conditions. On the other hand, chalcones possessing a hydroxyl group in position 2′ cyclize to form flavanones in basic media. By synthesizing 2′-hydroxyflavylium tetrafluoroborate, it was possible to obtain trans-2,2′-dihydroxychalcone that in solution can evolve to 2′-hydroxyflavanone or back to 2′-hydroxyflavylium depending on the pH. The several equilibria established in aqueous solution were fully characterized. The importance of including flavanones into the flavylium network of chemical reactions is briefly exploited. [Copyright &y& Elsevier]
- Subjects :
- *CHEMICAL processes
*CHEMICAL reactions
*HYDROGEN-ion concentration
*SALTS
Subjects
Details
- Language :
- English
- ISSN :
- 00404020
- Volume :
- 64
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Tetrahedron
- Publication Type :
- Academic Journal
- Accession number :
- 27941209
- Full Text :
- https://doi.org/10.1016/j.tet.2007.11.007