What question did this study set out to answer?

Investigate the chemical structures and formation pathways of colored compounds generated via the oxidative coupling of caffeic acid esters with α-alanine or β-alanine.

August 15, 2026Journal of Agricultural and Food Chemistry

Comparative LC−MSStudy of Colored CompoundsDerived from Oxidative Coupling of Caffeic Acid Esters with α-or β-Alanine

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Authors

ASAnn-Sophie SchweizerUniversity of Bonn MPMaike PassonUniversity of Bonn ASAndreas SchieberUniversity of Bonn

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Implication

Comparative spectrometry analysis reveals benzacridine core formation during oxidative coupling of caffeic acid esters with alanines, highlighting mechanisms of color development in food chemistry.

Key Points

Investigate the chemical structures and formation pathways of colored compounds generated via the oxidative coupling of caffeic acid esters with α-alanine or β-alanine.
Reacted methyl caffeate (MCA) or 5-caffeoylquinic acid (5-CQA) with α-alanine or β-alanine in model systems.
Characterized reaction products by analyzing UV–vis absorption spectra, fragmentation patterns, and exact masses using UHPLC-DAD-ESI-LIT-MS and UHPLC-DAD-ESI-QToF-MS.
Both caffeic acid esters formed analogous colored reaction products featuring a benzacridine core, with MCA yielding less complex profiles due to the lack of acyl migration.
N-unsubstituted benzacridines were detected exclusively with α-alanine, whereas N-substituted benzacridines formed unexpectedly in reactions with both α- and β-alanine.

Cite This Study

Schweizer et al. (2026) studied this question.

synapsesocial.com/papers/6a8019fe75c2e31742c8659b https://doi.org/10.1021/acs.jafc.6c03246

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Implication

Comparative spectrometry analysis reveals benzacridine core formation during oxidative coupling of caffeic acid esters with alanines, highlighting mechanisms of color development in food chemistry.

Comparative LC−MSStudy of Colored CompoundsDerived from Oxidative Coupling of Caffeic Acid Esters with α-or β-Alanine

Discussion

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Implication

Key Points

Cite This Study

Comparative LC−MSStudy of Colored CompoundsDerived from Oxidative Coupling of Caffeic Acid Esters with α-or β-Alanine

Discussion

Member takes

Implication

Key Points

Cite This Study

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