Enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by Candida antarctica lipase B
Flavonoids are polyphenolic compounds characteristic of higher plants. They are largely present in human diet and their properties are likely to interest food, cosrnetic and pharmaceutical industries. The aim of this work was to synthesize phenolic esters of flavonoids by an enzyrnatic process. This...
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2004
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Online Access: | https://hal.univ-lorraine.fr/tel-01749748 https://hal.univ-lorraine.fr/tel-01749748/document https://hal.univ-lorraine.fr/tel-01749748/file/INPL_T_2004_ENAUD_E.pdf |
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ftunilorrainehal:oai:HAL:tel-01749748v1 2023-07-30T03:56:58+02:00 Enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by Candida antarctica lipase B Fonctionnalisation enzymatique de composés phénoliques :synthèses d'esters aromatiques de flavonoïdes glycosylés catalysées par la lipase B de Candida antarctica Enaud, Estelle Institut National Polytechnique de Lorraine (INPL) Institut National Polytechnique de Lorraine Michel Girardin Bernadette Piffaut 2004-05-05 https://hal.univ-lorraine.fr/tel-01749748 https://hal.univ-lorraine.fr/tel-01749748/document https://hal.univ-lorraine.fr/tel-01749748/file/INPL_T_2004_ENAUD_E.pdf fr fre HAL CCSD NNT: 2004INPL020N tel-01749748 https://hal.univ-lorraine.fr/tel-01749748 https://hal.univ-lorraine.fr/tel-01749748/document https://hal.univ-lorraine.fr/tel-01749748/file/INPL_T_2004_ENAUD_E.pdf info:eu-repo/semantics/OpenAccess https://hal.univ-lorraine.fr/tel-01749748 Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2004. Français. ⟨NNT : 2004INPL020N⟩ Aromatic acid Phenolic acid Enzyrnatic acylation Flavonoid glycoside Candida antarctid lipase B Nonconventional media Acide aromatique Acide phenolique Acylation enzymatique Flavonoïde glycosylé Lipase B de Candida antarctica Milieu non conventionnel Flavonoïdes-Synthèse Esters-Synthèse Lipases Acylation [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition info:eu-repo/semantics/doctoralThesis Theses 2004 ftunilorrainehal 2023-07-17T00:37:44Z Flavonoids are polyphenolic compounds characteristic of higher plants. They are largely present in human diet and their properties are likely to interest food, cosrnetic and pharmaceutical industries. The aim of this work was to synthesize phenolic esters of flavonoids by an enzyrnatic process. This acylation should modify their physicochemical properties and eventually enhance their biological properties. Immobilized Candida antarctica lipase B (Novozym 435®) was used to catalyse acylation of flavonoids with various aromatic non activated acyl donors. Aromatic esters of non-substituted acids (benzoic and cinnamic acids) were synthesized with good yields. Best results were obtained by transesterification under reduced pressure. At best, a 99% conversion yield of flavonoid was obtained in 25 h, in the presence of solvent (2-methylbutan-2-ol) at 80°C, 200 mbar. In media where the acyldonor acts as the solvent, total conversion of flavonoid glucosides and neohesperidosides was reached in less than 12 h, at 80°C, 200 mbar. Principal handicap of these syntheses was the low solubility of flavonoid glycosides in organic solvents. All characterized products (phloridzin cinnamate, benzoate, salicylate, isoquercitrin 4ilinamate, neohesperidine dihydrochalcone cinnamate and salicylate) are monoesters regioselectively acylated on position 6OH of the glycoside moiety (primary hydroxyl). However, Novozym 435® did not synthesize phenolic esters of flavonoids when acyl donor has a phenolic fonction conjugated with the carboxylic function (caffeic acid). An exception resides in the synthesis of flavonoid salicylates which only occurred in methyl salicylate, liquid in our experimental conditions. Les flavonoïdes sont des composés polyphénoliques caractéristiques des végétaux supérieurs. Ils sont largement présents dans notre alimentation et leurs propriétés intéressent les industries agroalimentaires, cosmétiques et pharmaceutiques.L'objectif de ce travail était de synthétiser des esters phénoliques de flavonoïdes par voie ... Doctoral or Postdoctoral Thesis Antarc* Antarctica Université de Lorraine: HAL |
institution |
Open Polar |
collection |
Université de Lorraine: HAL |
op_collection_id |
ftunilorrainehal |
language |
French |
topic |
Aromatic acid Phenolic acid Enzyrnatic acylation Flavonoid glycoside Candida antarctid lipase B Nonconventional media Acide aromatique Acide phenolique Acylation enzymatique Flavonoïde glycosylé Lipase B de Candida antarctica Milieu non conventionnel Flavonoïdes-Synthèse Esters-Synthèse Lipases Acylation [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition |
spellingShingle |
Aromatic acid Phenolic acid Enzyrnatic acylation Flavonoid glycoside Candida antarctid lipase B Nonconventional media Acide aromatique Acide phenolique Acylation enzymatique Flavonoïde glycosylé Lipase B de Candida antarctica Milieu non conventionnel Flavonoïdes-Synthèse Esters-Synthèse Lipases Acylation [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition Enaud, Estelle Enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by Candida antarctica lipase B |
topic_facet |
Aromatic acid Phenolic acid Enzyrnatic acylation Flavonoid glycoside Candida antarctid lipase B Nonconventional media Acide aromatique Acide phenolique Acylation enzymatique Flavonoïde glycosylé Lipase B de Candida antarctica Milieu non conventionnel Flavonoïdes-Synthèse Esters-Synthèse Lipases Acylation [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition |
description |
Flavonoids are polyphenolic compounds characteristic of higher plants. They are largely present in human diet and their properties are likely to interest food, cosrnetic and pharmaceutical industries. The aim of this work was to synthesize phenolic esters of flavonoids by an enzyrnatic process. This acylation should modify their physicochemical properties and eventually enhance their biological properties. Immobilized Candida antarctica lipase B (Novozym 435®) was used to catalyse acylation of flavonoids with various aromatic non activated acyl donors. Aromatic esters of non-substituted acids (benzoic and cinnamic acids) were synthesized with good yields. Best results were obtained by transesterification under reduced pressure. At best, a 99% conversion yield of flavonoid was obtained in 25 h, in the presence of solvent (2-methylbutan-2-ol) at 80°C, 200 mbar. In media where the acyldonor acts as the solvent, total conversion of flavonoid glucosides and neohesperidosides was reached in less than 12 h, at 80°C, 200 mbar. Principal handicap of these syntheses was the low solubility of flavonoid glycosides in organic solvents. All characterized products (phloridzin cinnamate, benzoate, salicylate, isoquercitrin 4ilinamate, neohesperidine dihydrochalcone cinnamate and salicylate) are monoesters regioselectively acylated on position 6OH of the glycoside moiety (primary hydroxyl). However, Novozym 435® did not synthesize phenolic esters of flavonoids when acyl donor has a phenolic fonction conjugated with the carboxylic function (caffeic acid). An exception resides in the synthesis of flavonoid salicylates which only occurred in methyl salicylate, liquid in our experimental conditions. Les flavonoïdes sont des composés polyphénoliques caractéristiques des végétaux supérieurs. Ils sont largement présents dans notre alimentation et leurs propriétés intéressent les industries agroalimentaires, cosmétiques et pharmaceutiques.L'objectif de ce travail était de synthétiser des esters phénoliques de flavonoïdes par voie ... |
author2 |
Institut National Polytechnique de Lorraine (INPL) Institut National Polytechnique de Lorraine Michel Girardin Bernadette Piffaut |
format |
Doctoral or Postdoctoral Thesis |
author |
Enaud, Estelle |
author_facet |
Enaud, Estelle |
author_sort |
Enaud, Estelle |
title |
Enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by Candida antarctica lipase B |
title_short |
Enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by Candida antarctica lipase B |
title_full |
Enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by Candida antarctica lipase B |
title_fullStr |
Enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by Candida antarctica lipase B |
title_full_unstemmed |
Enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by Candida antarctica lipase B |
title_sort |
enzymatic functionalization of polyphenolic compounds : synthesis of flavonoid glycosides aromatic esters catalyzed by candida antarctica lipase b |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.univ-lorraine.fr/tel-01749748 https://hal.univ-lorraine.fr/tel-01749748/document https://hal.univ-lorraine.fr/tel-01749748/file/INPL_T_2004_ENAUD_E.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
https://hal.univ-lorraine.fr/tel-01749748 Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2004. Français. ⟨NNT : 2004INPL020N⟩ |
op_relation |
NNT: 2004INPL020N tel-01749748 https://hal.univ-lorraine.fr/tel-01749748 https://hal.univ-lorraine.fr/tel-01749748/document https://hal.univ-lorraine.fr/tel-01749748/file/INPL_T_2004_ENAUD_E.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772815365384962048 |