Uncinatic acids A-C, three new carboxylated flavonoids from Selaginella uncinata

Li, Rui; Zou, Hui; Xu, Ping; Zou, Zhen‐Xing; Li, Jing; Cheng, Fei; Liu, Ruihuan; Zhang, Gan; Xu, Kang‐Ping; Tan, Gui‐Shan

doi:10.1016/j.cclet.2017.03.004

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…Flavonoids are very useful in food and cosmetic production due to their antimicrobial and antioxidant properties. 18,19 However, one of the preliminary and critical steps before application lies in their extraction. 20−22 To improve the extraction efficiency of flavonoids, it is necessary to study the interactions in the extraction process.…”

Section: ■ Introductionmentioning

confidence: 99%

“…PCs are present in almost all plants as secondary metabolites and play an important role in their growth and reproduction, or in protecting them from pathogens and predators. − PCs contain one or more aromatic rings bearing one or more hydroxyl groups, including flavonoids (e.g., anthocyanins, flavonols, and proanthocyanidins) and nonflavonoids (e.g., phenolic acids, stilbenes, gallotannins, and lignins). Flavonoids are very useful in food and cosmetic production due to their antimicrobial and antioxidant properties. , However, one of the preliminary and critical steps before application lies in their extraction. − To improve the extraction efficiency of flavonoids, it is necessary to study the interactions in the extraction process.…”

Section: Introductionmentioning

confidence: 99%

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Insight into the Deep Eutectic Solvent Extraction Mechanism of Flavonoids from Natural Plant

Cao

Liu

Jing

et al. 2020

ACS Sustainable Chem. Eng.

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Deep eutectic solvents (DESs) are a new class of green solvents with potential applications for the extraction of target compounds from both liquid and solid samples. However, current research in the field has focused on demonstrating the advantages in extraction efficiency in terms of more extracted material and shortened time, while the mechanism of the increased efficiency has not been systematically studied. Herein, we explored the solvent and solute interaction mechanisms with the use of three extraction methods (heating, microwave-assisted, and mechanochemical extraction) and different types of DESs. Choline chloride (ChCl) was used as the hydrogen-bond acceptor, while hydrogen-bond donors used are malonic acid, methylurea, and glycerin. Flavonoids from Flos Sophorae were extracted. 1 H nuclear magnetic resonance (NMR) spectrometry, ultraviolet−visible (UV−vis) spectrometry, scanning electron microscopy (SEM), and ultrahigh-performance liquid chromatography (UPLC) analyses were performed to investigate the interactions between the flavonoids and the plant cell walls with DESs, and chemical reactions between the DESs and flavonoids. We also systematically evaluated the influence of several key factors on the extraction efficiency, which was consistent with the experimental results. The influence of DES in the sample on qualitative and quantitative UPLC analyses was systematically studied, and conditions were optimized. This study should provide insights into the interactions of specific DESs with various target compounds and help design more efficient extraction methods.

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Section: ■ Introductionmentioning

confidence: 99%