Showing papers on "Glucoside published in 1991"
TL;DR: The naturally occurring tetrahydrofurofuran-lignan-(syringaresinol, pinoresinol)-mono- and bis-glucosides were synthesized and their structures thereby confirmed as mentioned in this paper.
90 citations
TL;DR: The rhamnosyltransferase catalyzing the production of the bitter flavanone-glucosides, naringin and neohesperidin, was purified to homogeneity, the first complete purification of a rhamnose-transferase, and the isolation of the gene may enable its use in genetic engineering directed to modifying grapefruit bitterness.
78 citations
TL;DR: In this paper, twenty-four flavonoids were identified from Stachys aegyptiaca Pers and identified as vicenin, lueenin-2, apigenin and luteolin 7-glucosides.
74 citations
TL;DR: In this paper, HUNT et al. examined the Chinese crude drug "Shi-Hu" and four new phenolic compounds, 3-O-methylgigantol (2), ephemeranthoquinone (3, ephemerantol-A (5), and Ephemeranthol-B (7), and a new diterpene glucoside named ephemeranoside (9) were isolated along with four known compounds, denbinobinobin (1), 4, 7-dihydroxy-2, 3dimeth
Abstract: Constituents of Ephemerantha lonchophylla (HOOK. f.) P. F. HUNT et SUMMERH, which is used as a source plant of the Chinese crude drug "Shi-Hu", were examined and four new phenolic compounds, 3-O-methylgigantol (2), ephemeranthoquinone (3), ephemeranthol-A (5), and ephemeranthol-B (7), and a new diterpene glucoside named ephemeranthoside (9) were isolated along with four known compounds, denbinobin (1), 4, 7-dihydroxy-2, 3-dimethoxyphenanthrene (4), erianthridin (6), and gigantol (8). The structures of the new compounds were determined on the basis of spectroscopic data.
54 citations
01 Jan 1991
TL;DR: The conjugation of herbicides with glutathione or glucose are frequently species specific reactions that result in herbicide detoxification and selectivity, and the role that these reactions play in the selectivity of specific herbicides is reviewed.
Abstract: The conjugation of herbicides with glutathione or glucose are frequently species specific reactions that result in herbicide detoxification Therefore, glutathione and glucoside conjugation play an important role in herbicide detoxification and selectivity Phase 1 activation reactions are sometimes necessary before glutathione or glucoside conjugation can occur In these cases, the Phase 1 reaction rather than conjugation may be responsible for herbicide selectivity This appears to be particularly true in the metabolism of herbicides to 0-glucoside conjugates The glutathione-S-transferases and glucosyltransferases that catalyze these conjugation reactions, the role that these reactions play in the selectivity of specific herbicides, factors that affect these reactions, and the secondary metabolism of glutathione and glucoside conjugates are reviewed
51 citations
TL;DR: In this article, the synthesis of 10 conjugates of the mycotoxin 4-deoxynivalenol (DON) is described, including eight fatty acid esters and two glucosides.
Abstract: The synthesis of 10 conjugates of the mycotoxin 4-deoxynivalenol (DON) is described. The compounds synthesized include eight fatty acid esters and two glucosides. Fattyacid esters of DON were synthesized at positions 3 and 15 by reaction of DON with the appropriate acid chlorides in the presence of pyridine, while the glucosides were obtained by a Koenigs-Knorr reaction with acetobromoglucose. HPLC methods for the analysis of these compounds are also described.
47 citations
TL;DR: From the fruits of Sambucus canadensis four anthocyanin glycosides have been isolated by successive application of an ion-exchange resin, droplet-counter chromatography and gel filtration, determining the structure of the novel, major pigment, cyanidin 3-O-[6-O-(E-p-coumaroyl-2-O]-5-O-beta-D-glucopyranoside].
46 citations
TL;DR: Cell suspensions of Linum flavum L.C. contained large amounts of the glucoside coniferin which was accumulated endogenously up to 12.4% on a dryweight basis, and a rapid and effective isolation procedure for Coniferin was developed.
Abstract: Cell suspensions of Linum flavum L. contained large amounts (2 g·l−1) of the glucoside coniferin which was accumulated endogenously up to 12.4% on a dryweight basis. Callus material contained 5.6%, while in leaves of in-vitro-grown plantlets, the origin of the callus and suspension cultures, no coniferin could be detected. Leaf, callus and suspension material were compared for metabolite accumulation and associated enzyme activities. High coniferin contents corresponded with low 5-methoxypodophyllotoxin levels. A reciprocal relationship between β-glucosidase (E.C. 3.2.1.21) activity and coniferin accumulation was found. No relationship between peroxidase (E.C. 1.11.1.7) activity and coniferin accumulation or 5-methoxypodophyllotoxin could be demonstrated. Finally, a rapid and effective isolation procedure for coniferin was developed.
40 citations
TL;DR: The synergistic effect of phloretin glucoside with chlorogenic acid and catechin must be taken into account in the browning reactions of apple products.
Abstract: Enzymatic oxidation of phloretin glucoside and its effect on chlorogenic acid and catechin in relation to the browning reactions were studied in model systems. The synergistic effect of phloretin glucoside with chlorogenic acid and catechin must be taken into account in the browning reactions of apple products
39 citations
TL;DR: In this paper, three new phenolic glycosides have been isolated from the leaves of Viburnum dilatatum (Caprifoliaceae) and their structures elucidated as p-hydroxyphenyl 6-O-trans- cafreoyl-β-d -glucoside, phydroxymhenyl6-O -trans-cafreoyl -β- d -alloside and 4-allyl-2-methoxyphensyl 6 -O-β -d -apiosyl
39 citations
TL;DR: A new acylated monoterpene glucoside, galloylpaeoniflorin, was isolated from Paeony root and the structure was determined by chemical and spectroscopic methods.
Abstract: A new acylated monoterpene glucoside, galloylpaeoniflorin, was isolated from Paeony root. The structure was determined by chemical and spectroscopic methods.
TL;DR: In 10 patients with extrahepatic cholestasis caused by carcinoma of the head of the pancreas the formation of bile acid glucosides has been described as a novel conjugation mechanism in vitro and in vivo.
TL;DR: A new iridoid glucoside, majorosides, along with the known aucubin have been isolated from Plantago major from Bulgaria and Mongolia and are reported on the basis of chemical and spectroscopic studies.
Journal Article•
TL;DR: Column chromotography and preparative TLC of the light petroleum-diethyl ether extract from Bidens pilosa L. afforded tridecapentyn-1-ene, trideca-2,12-diene-4,6,8,10-tetrayne-1,2-diol and tridca-5-ene-7,9,11-triyne-3-ol, which indicated the presence of 5 acids.
Abstract: Column chromotography and preparative TLC of the light petroleum-diethyl ether extract from Bidens pilosa L. afforded tridecapentyn-1-ene, trideca-2,12-diene-4,6,8,10-tetrayne-1-ol, trideca-3,11-diene-5,7,9-triyne-1,2-diol and trideca-5-ene-7,9,11-triyne-3-ol. The compounds were identified on the bases of UV, 1H-NMR spectra and comparison with reported data. The chloroform extract was chromatographed to yield B-amyrin, phytosterin-B, esculetin and B-sitosterol glucoside. The petroleum ether extract afforded long chain ester, saturated hydrocarbon, long chain alcohol, B-amyrin, phytosterin-B, lupeol and lupeol acetate. GLC analysis of the fatty acids indicated the presence of 5 acids. The antimicrobial test was carried out to indicate an evident activity. The antidiabetic activity showed non significant decrease of blood glucose.
TL;DR: From the whole plant of Corchorus depressus, in addition to sitosterol glucoside, satosterol, apigenin and luteolin, three new α-amyrin derivatives have been isolated and their structures established by spectral data and chemical evidence as mentioned in this paper.
TL;DR: To investigate the capacity of Drosophila extracts to glucosylate exogenous substrates, a fast and sensitive method for the detection of UDP-glucosyltransferase activity using 4-nitrophenol, 1-naphthol, or 2-nafthol as substrates is developed.
TL;DR: It is concluded that AA-2G is a possible metabolite produced by enzymatic alpha-glucosidation after a combined administration of AA and maltose to guinea pigs and rats.
TL;DR: In this paper, 6-Methoxygeniposidic acid, a new iridoid glucoside, was isolated from the roots of Rubia cordifolia.
TL;DR: Comparison of IR and GC/EI-MS spectra of authentic beta-furfuryl-beta-glucoside with native aglycone confirmed the conclusion that Activator I is beta- furfury l alcohol, and the purification and chemical analysis indicated that the compound contains a single beta-linked glucosyl residue.
TL;DR: A malonic acid ester derivative of the flavanone naringin was found to be abundant in the young leaves and fruits of grapefruit plants, but not in the mature leaves and fruit.
Patent•
21 Feb 1991
TL;DR: The embryomic axes of soybeans are ground and extracted with a 70% aqueous alcohol three times as discussed by the authors, and the extracted solution is vacuum-dried with a rotary evaporator, sufficiently dissolved in a mixture of butanol and water and subsequently vigorously stirred in a separating funnel to extract the glucosides of the soybeans.
Abstract: PURPOSE: To provide the subject glucoside such as glysitein-7-O-β-6"-O-acetyl)-D- glucopyranoside capable of being isolated and purified from the inexpensive embryonic axes of soybeans, and having physiological activities such as oxidation resistance, estrogen action, anti-bacterial property and anti-cancer property CONSTITUTION: The embryomic axes of soybeans are ground and extracted with a 70% aqueous alcohol three times The extracted solution is vacuum-dried with a rotary evaporator, sufficiently dissolved in a mixture of butanol and water and subsequently vigorously stirred in a separating funnel to extract the glucosides of the soybeans The butanol layer is concentrated and dried with a rotary evaporator to produce a fraction of the crude soybean glucoside The crude fraction is purified by a gel-filtration method, thin layer chromatography or high performance liquid chromatography to provide a soybean isoflavone glucoside comprising glysitein-7-O-β-(6"-O-acetyl)-D- glucopyranoside and glysitein-7-O-β-(6"-malonyl)-D-glucopyranoside soybeans COPYRIGHT: (C)1992,JPO&Japio
TL;DR: In this article, twenty-four compounds were isolated from Penianthus zenkeri and their structures determined by spectroscopic and chemical studies, including 6-Hydroxycolumbin, 6-hydroxyisocolumbin and penianthic acid methyl ester.
TL;DR: In this article, the authors present the Benzyl Glucoside from Tea leaves. But they do not discuss its application in the field of agricultural and biological chemistry. No. 55, No. 4, pp. 1205-1206
Abstract: (1991). Benzyl Glucoside from Tea Leaves. Agricultural and Biological Chemistry: Vol. 55, No. 4, pp. 1205-1206.
TL;DR: From Dipsacus laciniatus, a new phenolic glucoside named dipsaicin was isolated in addition to the known iridoid glucosides, sylvestroside 11 and loganin aglucone as discussed by the authors.
TL;DR: In this paper, a bisiridoid glucoside, ligustrinoside (1), along with three known iridoids, loganin loganetin and loganic acid was isolated from the wood of Strychnos ligustrina BL. (Loganiaceae), collected in Indonesia.
Abstract: A new bisiridoid glucoside, ligustrinoside (1), along with three known iridoids, loganin loganetin and loganic acid was isolated from the wood of Strychnos ligustrina BL. (Loganiaceae), collected in Indonesia. The structure of ligustrinoside (1) has been determined as an ester dimmer of loganin and loganic acid between C-7 and C-11.
TL;DR: A new flavone glucoside macrophylloside has been isolated from the whole plant of Primula macrophylla and its structure was determined by spectroscopic methods as 2′-hydroxy-7-O-β- d -glucopyranosyloxyflavone.
TL;DR: In this paper, the reaction between a vinyl sulfone dye and methyl-α-d -glucoside was studied in H 2 O-dioxan solution, and the attacking site of different OH groups in methyl α-d-glucose was determined by AM 400 1 H-NMR spectroscopy, and reaction products were separated by a TLC-double scanning method.