Flavonoid galloyl glucosides from the pods of Acaciafarnesiana (original) (raw)

Journal of Chemical Research-s, 2002

A novel isoflavone, 5,7-dihydroxy-4'-pmethyl benzyl isoflavone 1a, and three known flavonoids apigenin, luteolin and quercetin have been isolated from the leaves ol Acacia tortilis. Their structures were elucidated by chemical and physical data (lR, UV, IH-NMR,13C-NMR and MS spectra).

Flavonoid Glycosides From Acacia Tortilis

2020

From the leaves of Acacia tortilis, a new chalcone glycoside, 2ʹ,6ʹ-dihydroxy chalcone-4ʹ-O-glucoside along with the known compounds, vitexin and 4-methoxy chalcone have been isolated. The structure of compounds was identified by various spectrophotometric techniques (UV, IR, 1HNMR, 13CNMR and Mass Spectrometry).

ChemInform Abstract: Isolation of Two Flavonol Glycosides from the Seeds of Acacia nilotica

ChemInform, 2001

Two new flavonol glycosides viz. 5-hydroxy-7,4'-dimethoxy-8-isoprenylfl avo ne-3-0-p-o-xy lopyranoside and 5,7,3',4'-tetrahydroxy-6.8.2'-trimethoxyflavone-3-0-a-Lrh am no syl (I ~2)-O P-o-glucopyranoside have been isolated from th e seeds of Acacia nilotica (Linn). The structure of these g lycosides have been establ ished on the basis of chemical and spectral ev idences. Acacia nilolica, a member of the leguminosae family, is found abundantly all over India. Acacia is well known for medicinal values '. Acacia species give a number of compounds belonging to different classes, such a flavonoids / anthocyan ins, acid, catechins 3 etc.

Classification and Identification of Flavonoids from plant kingdom as Acacia species

Flavonoids, a group of natural substances with variable phenolic structures, are found in fruits, vegetables, grains, bark, roots, stems, flowers, tea and wine. These natural products are well known for their beneficial effects on health and efforts are being made to isolate the ingredients so called flavonoids. Flavonoids are now considered as an indispensable component in a variety of nutraceutical (are products, nutrition are also used as medicine), pharmaceutical, medicinal and cosmetic applications. This is attributed to their antioxidative, anti-inflammatory, anti-mutagenic and anticarcinogenic properties coupled with their capacity to modulate key cellular enzyme function. In this study we try to classify the flavonoids from higher plant specially Acacia species. Various sub groups of flavonoids are classified according to the substitution pattern of ring C. Flavonoids classified into: flavones, flavanols, flavanones, chalcones, aurones, isoflavonoids and anthocyanins .The chemical structure of the all types of flavonoids can be deduced on the basis of its Infrared(IR),Ultra violet (UV), proton nuclear magnetic resonance (1 H NMR) Spectrophotometer.

Isolation of two flavonol glycosides from the seeds of Acacia nilotica

Indian Journal of Chemistry. Section B, Organic including Medicinal, 2000

Flavonoids from the exudate of Acacia neovernicosa

Phytochemistry, 1982

2',4'-Dihydroxychalcone, 4'-hydroxy-2'-methoxychalcone and 2',4'-dihydroxy-3'-methoxychalcone were isolated and characterized from the resinous exudate produced by Acacia neovemicosa. Smaller amounts of isoliquiritigenin, pinocembrin and chrysin were also found and identified by their chromatographic properties and UV spectra. The material of one collection contained galangin, 3-methylkaempferol and 3,3'dimethylquercetin.

Configuration and conformation of dihydroflavonols from Acacia melanoxylon

Phytochemistry, 1987

Key Wd t&x--~ccwu, mcluo~ylon; lqununome; branwood; L3_ci(-3'.4'.7,&ItlrPhydroxy~hydroftavo~~ 2,3-rr,rnr-3',4'.7.8.-tctrahydroxydihydrotlsvo~; LErronr-~.J',7-Inhydroxy-S-meIhoxydihydroAavonol; confiyralion; conformation; bogeaais. Ahtract-The isolation of two novel dihydrollavonols, namely ( -)2,3&s-3',4',7,&tetrabydroxydihydroflavonol and ( + )2,3-rrun.s-3',4',7-trihydroxy-S-methoxydihydroftavonol together with tbc known ( + )2,3-rruns-3',4',7,8tetrahydroxydihydroflavonol from Acacia melunoxylon is described. 'H NMR study shows the aryl substituent at C-2

8-O-methyl- and the first 3-O-methylflavan-3,4-diols from Acacia saxatilis

Phytochemistry, 1974

Key Word Index-Am& sa.xatilis; Leguminosae; coloured heartwood constituents: fiavan-3,4-diolmethyl ethers; diastereoisomers: flavonols: flavanones. Ahsbact-The rightpurpk hear~~od of Acacia sax&l's contains t t j-2,3rtvut~s-3,4-rruns-and \: f)-2,3-rrans-3,4ri.~-diastereoisomers of X-methoxy-7,3',4'-trihydroxy-and 7,3',4'-trihydroxyflavan-3.4.diols as major com-POIlCllk Evidence was also obtained of the first 3-methyl ether of metabolites of this type, notably of (+)-8-methoxy-T.~':~itrliiydioxy-~~f~~J~~.s-ffavan-i~-~l~-oib~ FTavonoi, aiiiydi-offavonol' and' ffavanone analbgues accompany these. The correlation between colour of Acacia heartwoods and structure, phenolic substitution, stereochemistry and composition of their flavonoid components is discussed.

Exploring the Phytochemicals of Acacia melanoxylon R. Br

Plants, 2021

Invasive species are currently a world menace to the environment, although the study of their chemistry may provide a means for their future beneficial use. From a study of Portuguese Acacia melanoxylon R. Br. five known compounds were isolated: lupeol, 3β-Z-coumaroyl lupeol, 3β-E-coumaroyl lupeol (dioslupecin A), kolavic acid 15-methyl ester and vomifoliol (blumenol A). Their structures were elucidated by 1D and 2D NMR spectroscopy and mass spectrometry, and as a result some corrections are made to their previous 13C NMR assignments. Cytotoxicity of 3β-E-coumaroyl lupeol (dioslupecin A) and kolavic acid 15-methyl ester was evaluated against HCT116 human colorectal cancer cells although biological activity was not evident.

Flavonoid galloyl glucosides from the pods of Acaciafarnesiana (original) (raw)

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