1. NMR structural elucidation of dehydrodimers resulting from oxidation of 5-O-caffeoylquinic acid in an apple juice model solution
- Author
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Erika Salas, Sandrine Pottier, Arnaud Bondon, Claudia Mariana Castillo-Fraire, Sylvain Guyot, Pascal Poupard, Stéphane Bernillon, Unité de recherche sur les Biopolymères, Interactions Assemblages (BIA), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Plate-forme Rennaise d'Imagerie et Spectroscopie Structurale et Métabolique (PRISM), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Universidad Autónoma de Chihuahua (UACH), Biologie du fruit et pathologie (BFP), Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Insitut Français des Productions Cidricoles (IFPC), the Mexican Council for Science and Technology (CONACYT) (556831), Part of this work was performed using the PRISM core facility (Biogenouest©, UMS Biosit, Université de Rennes 1- Campus de Villejean- 35043 RENNES Cedex, FRANCE)., Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Rennes (UR)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
- Subjects
FOCH 131117 ,Magnetic Resonance Spectroscopy ,5-O-caffeoylquinic acid ,PPO ,chlorogenic acid ,Quinic Acid ,phenolic compounds ,Mass spectrometry ,01 natural sciences ,Polyphenol oxidase ,Analytical Chemistry ,Food Chemistry phenolic compounds ,chemistry.chemical_compound ,0404 agricultural biotechnology ,[CHIM.GENI]Chemical Sciences/Chemical engineering ,Chlorogenic acid ,[SDV.IDA]Life Sciences [q-bio]/Food engineering ,Organic chemistry ,caffeicin ,chemistry.chemical_classification ,CQA dehydrodimers ,010401 analytical chemistry ,Substrate (chemistry) ,04 agricultural and veterinary sciences ,General Medicine ,Nuclear magnetic resonance spectroscopy ,Hydroxycinnamic acid ,040401 food science ,0104 chemical sciences ,Enzyme ,chemistry ,Malus ,Food Science - Abstract
International audience; During apple juice and cider-making processes, phenolic compounds undergo enzymatic 21oxidation. 5-O-caffeoylquinic acid (CQA) is one of the major hydroxycinnamic acid derivatives 22and it is the preferential substrate for polyphenol oxidase (PPO) in apple juices. Consequently, 23CQA dehydrodimers (MW 706 Da) are among the main products resulting from CQA oxidation. 24CQA dehydrodimers were previously synthesized in a biomimetic apple juice model solution. 25Following their purification and characterization using UV-Visible spectra and mass 26spectrometry, the structures of seven CQA dehydrodimers were elucidated using 1H and 13C one- 27and two-dimensional NMR spectroscopy. Six of them exhibited dihydrobenzofuran, 28benzodioxane, or dihydronaphtalene skeletons, which are caffeicin-like structures. Interestingly, 229a new dehydrodicaffeoyldiquinic acid molecule was also characterised for which two novel 30structures showing a symmetric dicatechol skeleton were also proposed
- Published
- 2022
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