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Published on: May 5, 2023
Isolation and structural characterization of anthocyanin-furfuryl pigments
André Sousa1, Nuno Mateus, Artur Manuel Soares Silva
1Departamento de Química, Faculdade de Ciências, Universidade do Porto, Centro de Investigação em Química, Porto, Portugal.
Abstract:
Condensation reactions of malvidin-3-glucoside with two representative oak wood furanic aldehydes (furfural and methylfurfural) were conducted in wine-like model solutions. Methylfurfural led to the formation of malvidin-3-glucoside-methylfurfural (603 m/z), whereas furfural led to the formation of malvidin-3-glucoside-furfural (589 m/z). The latter was structurally characterized by 1D and 2D NMR, allowing an elucidation of the formation mechanism of these anthocyanin-furanic aldehyde adducts in the absence of flavanols.
