Synthesis and structural characterization of novel pyranoluteolinidin dyes

abstract

The synthesis and structural characterization by LC-MS and NMR of novel pyranoluteolinidin derivatives are reported. The compounds result from the reactions between luteolinidin and three different carboxylic acids in wine model-like solutions. The three pigments possess different substituents attached to the D ring (methyl, catechol and dimethylaminophenyl groups) and the same catechol group in the B ring, yielding a wide spectrum of colors from yellow to pink-purple. (C) 2016 Elsevier Ltd. All rights reserved.

keywords

PIGMENTS; SALTS; WINE; 3-DEOXYANTHOCYANIDINS; PYRANOANTHOCYANINS; ANTHOCYANINS; ANTIOXIDANT; CHEMISTRY

subject category

Chemistry

authors

Cruz, L; Sousa, JLC; Marinho, A; Mateus, N; de Freitas, V

our authors

acknowledgements

The authors thank Dra. Zelia Azevedo for the MS analysis and Dra. Mariana Andrade for the NMR analysis. This research was supported by a research project grant (PTDC/QEQ-QFI/1971/2014) with financial support from FCT/MEC through national funds and co-financed by FEDER, under the Partnership Agreement PT2020 (UID/QUI/50006/2013 - POCI/01/0145/FEDER/007265). Luis Cruz gratefully acknowledges FCT for his post-doc grant (SFRH/BPD/72652/2010).

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