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Journal Articles Tetrahedron Year : 2016

A simple synthesis of 3-deoxyanthocyanidins and their O-glucosides


This work deals with the chemical synthesis of simple analogs of anthocyanins, the main class of watersoluble natural pigments. Flavylium ions with hydroxyl, methoxyl and β-D-glucopyranosyloxyl substituents at positions 40 and 7 have been prepared by straightforward chemical procedures. Moreover, the two 3-deoxyanthocyanidins of red sorghum apigeninidin (40,5,7-trihydroxyflavylium) and luteolinidin (30,40,5,7-tetrahydroxyflavylium) were synthesized in a one-step protocol. Attempts to synthesize luteolinidin O-β-D-glucosides resulted in a mixture of the 5-O- and 7-O-regioisomers in low yield. A preliminary study of the 40-β-D-glucopyranosyloxy-7-hydroxyflavylium and 7-β-D-glucopyranosyloxy-40-hydroxy-flavylium ions shows that simply changing the glucosidation site can profoundly affect the color intensity and stability.
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hal-02638011 , version 1 (28-05-2020)



Sheiraz Al Bittar, Nathalie Mora, Michele Loonis, Olivier O. Dangles. A simple synthesis of 3-deoxyanthocyanidins and their O-glucosides. Tetrahedron, 2016, 72 (29), pp.4294-4302. ⟨10.1016/j.tet.2016.05.076⟩. ⟨hal-02638011⟩
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