491-50-9

Basic information

• Product Name: C.I. 75710
• Synonyms: C.I. 75710;7-(β-D-Glucopyranosyloxy)-2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-4H-1-benzopyran-4-one;7-(β-D-Glucopyranosyloxy)-3,3',4',5-tetrahydroxyflavone;7-(β-D-Glucopyranosyloxy)-5,3',4'-trihydroxyflavonol;Quercetin 7-glucoside;Quercetin-7-O-beta-D-glucopyranoside;Quercetin-7-O-β-D-glucopyranoside;QuerciMeritroside
• CAS NO: 491-50-9
• Molecular Formula: C₂₁H₂₀O₁₂
• Molecular Weight: 464.38
• Product Categories: Flavanols;chemical reagent;pharmaceutical intermediate;phytochemical;reference standards from Chinese medicinal herbs (TCM).;standardized herbal extract
• Mol File: 491-50-9.mol

Chemical Properties

• Melting Point: 248 °C
• Boiling Point: 859.2 °C at 760 mmHg
• Flash Point: 302.8 °C
• Appearance: /
• Density: 1.809 g/cm³
• Vapor Pressure: 1.85E-31mmHg at 25°C
• Refractive Index: 1.774
• Storage Temp.: 2-8°C
• PKA: 5.92±0.40(Predicted)
• CAS DataBase Reference: C.I. 75710(CAS DataBase Reference)
• NIST Chemistry Reference: C.I. 75710(491-50-9)
• EPA Substance Registry System: C.I. 75710(491-50-9)

Safety Data

• Hazardous Substances Data: 491-50-9(Hazardous Substances Data)

Usage

Uses

Used in Pharmaceutical Industry:
C.I. 75710 is used as a pharmaceutical compound for its antioxidant properties and potential therapeutic applications. Its antioxidant activity can help protect cells from damage caused by reactive oxygen species, which are involved in various diseases and aging processes.
Used in Cosmetic Industry:
C.I. 75710 is used as an active ingredient in the cosmetic industry due to its antioxidant and anti-inflammatory properties. It can be incorporated into skincare products to help protect the skin from environmental stressors and promote a healthy, youthful appearance.
Used in Food Industry:
C.I. 75710 can be used in the food industry as a natural antioxidant additive to extend the shelf life of various products and protect them from oxidation, which can lead to spoilage and loss of nutritional value.
Used in Research:
C.I. 75710 is also used in scientific research as a model compound to study the bioavailability, metabolism, and biological activities of flavonoids, which are a group of naturally occurring compounds with diverse health benefits.

Antimicrobial activity

Quercetin-7-O-beta-D-glucopyranoside has antibacterial activity, it shows promising activity against Staphylococcus aureus. Quercetin 7-O-beta-D-glucopyranoside exhibits strong antioxidative, and anti-inflammatory activities, inhibiting expression of inducible nitric oxide synthase and release of nitric oxide by lipopolysaccharide-stimulated RAW 264.7 macrophages in a dose-dependent manner. It inhibits overexpression of cyclooxygenase-2 and granulocyte macrophage-colony-stimulating factor.

Biological Activity

Quercetin-7-O-β-D-glucopyranoside is a flavonoid originally isolated from G. hirsutum that has diverse biological activities, including antioxidant, anti-inflammatory, and anti-angiogenic properties. It has antioxidant activity in a oxygen radical absorbance capacity (ORAC) assay and decreases tert-butyl hydroperoxide-induced reactive oxygen species (ROS) production in L-929 cells when used at concentrations of 0.25 and 1 μg/ml. Quercetin-7-O-β-D-glucopyranoside (15 and 30 μg/ml) reduces protein levels of inducible nitric oxide synthase (iNOS) and COX-2 in LPS-stimulated RAW 264.7 cells. It decreases angiogenesis in isolated rat aortic rings and proliferation of human umbilical vein endothelial cells (HUVECs) but has no effect on tube formation or chemotaxis of HUVECs when used at a concentration of 100 μM.

InChI:InChI=1/C21H20O12/c22-6-13-15(26)17(28)19(30)21(33-13)31-8-4-11(25)14-12(5-8)32-20(18(29)16(14)27)7-1-2-9(23)10(24)3-7/h1-5,13,15,17,19,21-26,28-30H,6H2

Upstream product

• 133-89-1 UDP-glucose 
• 117-39-5 quercetol 
• 498548-17-7 3-(benzyloxy)-2-(2,2-diphenylbenzo[d][1,3]dioxol-5-yl)-5,7-dihydroxy-4H-chromen-4-one 
• 1313191-78-4 2-(2,2-diphenyl-benzo[1,3]dioxol-5-yl)-3,5-bisbenzyloxy-7-(2,3,4,6-tetra-O-acetyl)-β-D-glucopyranosyloxy-4H-chromen-4-one 
• 1313191-77-3 2-(2,2-diphenyl-benzo[1,3]dioxol-5-yl)-3-benzyloxy-5-hydroxyl-7-(2,3,4,6-tetra-O-acetyl)-β-D-glucopyranosyloxy-4H-chromen-4-one 
• 357194-11-7 2-(2,2-diphenyl-1,3-benzodioxol-5-yl)-3,5-dihydroxy-7-[tetra-O-acetyl-β-D-glucopyranosyloxy]-4H-1-benzopyran-4-one 
• 357194-03-7 2-(2,2-diphenylbenzo[1,3]dioxol-5-yl)-3,5,7-trihydroxychromen-4-one 
• 339276-12-9 2,3,4,6-tetra-O-benzoyl-D-glucopyranosyl 1-(N-phenyl)-2,2,2-trifluoroacetimidate 
• 1064-06-8 3,5,7-triacetoxy-2-(3,4-diacetoxy-phenyl)-chromen-4-one 
• 143631-95-2 acetic acid 2-acetoxy-4-(3,5-diacetoxy-7-hydroxy-4-oxo-4H-chromen-2-yl)-phenyl ester 
• 357194-04-8 2-(2,2-diphenyl-1,3-benzodioxol-5-yl)-3,5-dihydroxy-7-(β-D-glucopyranosyloxy)-4H-1-benzopyran-4-one 

Downstream Products

• 50-99-7 D-glucose 
• 117-39-5 quercetol 
• 492-61-5 β-D-glucose 
• 2280-44-6 D-Glucose 

Relevant articles and documents

Exploring the catalytic promiscuity of a new glycosyltransferase from Carthamus tinctorius

The catalytic promiscuity of a new glycosyltransferase (UGT73AE1) from Carthamus tinctorius was explored. UGT73AE1 showed the capability to glucosylate a total of 19 structurally diverse types of acceptors and to generate O-, S-, and N-glycosides, making it the first reported trifunctional plant glycosyltransferase. The catalytic reversibility and regioselectivity were observed and modeled in a one-pot reaction transferring a glucose moiety from icariin to emodin. These findings demonstrate the potential versatility of UGT73AE1 in the glycosylation of bioactive natural products.

Regiospecific synthesis of quercetin O-β-d-glucosylated and O-β-d-glucuronidated isomers

Quercetin, the polyphenolic compound, which has the highest daily intake, is well known for its protective effects against aging diseases and has received a lot of attention for this reason. Both quercetin 3-O-β-d-glucuronide and quercetin 3′-O-β-d-glucuronide are human metabolites, which, together with their regioisomers, are required for biological as well as physical chemistry studies. We present here a novel synthetic route based on the sequential and selective protections of the hydroxyl functions of quercetin allowing selective glycosylation, followed by TEMPO-mediated oxidation to the glucuronide. This methodology enabled us to synthesize the five O-β-d-glucosides and four O-β-d-glucuronides of quercetin, including the major human metabolite, quercetin 3-O-β-d-glucuronide.

Cloning and functional characterisation of two regioselective flavonoid glucosyltransferases from Beta vulgaris

Two full-length cDNAs encoding flavonoid-specific glucosyltransferases, UGT73A4 and UGT71F1, were isolated from a cDNA library of Beta vulgaris (Amaranthaceae) cell suspension cultures. They displayed high identity to position-specific betanidin and flavonoid glucosyltransferases from Dorotheanthus bellidiformis (Aizoaceae) and to enzymes with similar substrate specificities from various plant families. The open reading frame of the sequences encode proteins of 476 (UGT73A4) and 492 (UGT71F1) amino acids with calculated molecular masses of 54.07 kDa and 54.39 kDa, and isoelectric points of 5.8 and 5.6, respectively. Both enzymes were functionally expressed in Escherichia coli as His- and GST-tagged proteins, respectively. They exhibited a broad substrate specificity, but a distinct regioselectivity, glucosylating a variety of flavonols, flavones, flavanones, and coumarins. UGT73A4 showed a preference for the 4′- and 7-OH position in the flavonoids, whereas UGT71F1 preferentially glucosylated the 3- or the 7-OH position. Glucosylation of betanidin, the aglycone of the major betacyanin, betanin, in B. vulgaris was also observed to a low extent by both enzymes. Several O-glycosylated vitexin derivatives isolated from leaves of young B. vulgaris plants and rutin obtained from B. vulgaris tissue culture are discussed as potential endogenous products of UGT73A4 and UGT71F1. The results are analyzed with regard to evolution and specificity of plant natural product glucosyltransferases.

Characterization of flavonoid 7-O-glucosyltransferase from Arabidopsis thaliana

Most flavonoids found in plants exist as glycosides, and glycosylation status has a wide range of effects on flavonoid solubility, stability, and bioavailability. Glycosylation of flavonoids is mediated by Family 1 glycosyltransferases (UGTs), which use UDP-sugars, such as UDP-glucose, as the glycosyl donor. AtGT-2, a UGT from Arabidopsis thaliana, was cloned and expressed in Escherichia coli as a gluthatione S-transferase fusion protein. Several compounds, including flavonoids, were tested as potential substrates. HPLC analysis of the reaction products indicated that AtGT-2 transfers a glucose molecule into several different kinds of flavonoids, eriodictyol being the most effective substrate, followed by luteolin, kaempferol, and quercetin. Based on comparison of HPLC retention times with authentic flavonoid 7-O-glucosides and nuclear magnetic resonance spectroscopy, the glycosylation position in the reacted flavonoids was determined to be the C-7 hydroxyl group. These results indicate that AtGT-2 encodes a flavonoid 7-O-glucosyltransferase.

Flavonoids from Cephalaria gigantea flowers

Luteolin, quercetin, cinaroside, quercimeritrin, and the new flavonol bioside gigantoside A were isolated from Cephalaria gigantea (Ledeb.) Bobr. (Dipsacaceae) flowers. Spectral properties and chemical transformations established that gigantoside A had the structure quercetin-7-O-[α-L- arabinopyranosyl(1→6)]-β-D-glucopyranoside.

Facile synthesis of flavonoid 7-O-glycosides

Highly regioselective removal of the 7-O-acyl groups of the peracylated flavones, isoflavones, and flavonols (PhSH, imidazole, NMP) followed by effective glycosylation with glycosyl trifluoroacetimidates (BF 3·Et2O) and cautious deprotection of the acyl groups under basic conditions afforded the desired 7-O-flavonoid glycosides in satisfactory yields.

Quercetin (=2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-1-benzopyran-4-one) Glycosides and Sulfates: Chemical Synthesis, Complexation, and Antioxidant Properties

Glycosides, acylated glycosides, and sulfates of Quercetin (=3,3',4',5,7-pentahydroxyflavone; 1), which is, together with its derivatives, among the most common polyophenols found in plants and in the human diet, were prepared and quantitatively investiga