Complete assignments of the 1H and 13C chemical shifts and JH,H coupling constants in NMR spectra of d-glucopyranose and all d-glucopyranosyl-d-glucopyranosides

Roslund, Mattias U.; Tähtinen, Petri; Niemitz, Matthias; Sjöholm, Rainer

doi:10.1016/j.carres.2007.10.008

Cited by 205 publications

(153 citation statements)

References 57 publications

(87 reference statements)

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“…The spectrum recorded at t = 0 h. shows a mixture of α and β anomers of Dcellobiose and only a trace amount of D-glucose. The anomeric composition of D-cellobiose in this mixture was calculated as α := β 1.00 : 1.60 using the peak area ratio Figure 3, t = 0 h), and this value is compatible with the reported anomeric ratio [33] of Dcellobiose in water. A gradual increase in D-glucose and the disappearance of D-cellobiose is seen in the series of spectra recorded during the course of the reaction.…”

Section: Hydrolysis Of D-cellobiose Using Aqueous 1-(1-propylsulfonicsupporting

confidence: 68%

Brönsted Acidic Ionic Liquid 1-(1-Propylsulfonic)-3-methylimidazolium-Chloride Catalyzed Hydrolysisof D-Cellobiose in Aqueous Medium

Amarasekara

Wiredu

2012

International Journal of Carbohydrate Chemistry

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Brönsted acidic ionic liquid 1-(1-propylsulfonic)-3-methylimidazolium chloride (PSMIMCl) shows a higher catalytic activity than sulfuric acid in the hydrolysis of D-cellobiose to D-glucose in water at 90-120• C. This catalytic activity enhancement is more significant at higher temperatures, and at 120• C, PSMIMCl produced 64.5% glucose yield, whereas H 2 SO 4 produced only 42.2% after 40 min. reaction, and this is a 52.8% enhancement of catalytic activity due to the alkylimidazolium group attached to the sulfonic acid group. 1 H NMR monitoring of the D-cellobiose hydrolysis in PSMIMCl and sulfuric acid mediums failed to reveal intermediates in the hydrolysis reaction, and this is probably due to rapid conversion of the intermediate(s) to a mixture of Dglucose anomers with α : β ≈ 1 : 1.6.

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Section: Hydrolysis Of D-cellobiose Using Aqueous 1-(1-propylsulfonicsupporting

confidence: 68%

Brönsted Acidic Ionic Liquid 1-(1-Propylsulfonic)-3-methylimidazolium-Chloride Catalyzed Hydrolysisof D-Cellobiose in Aqueous Medium

Amarasekara

Wiredu

2012

International Journal of Carbohydrate Chemistry

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“…The hexane extract inhibited 3.3% germination of the S. obtusifolia, and the ethyl acetate and the methanolic extract, 81.0% and 32.2% respectively. Confirmation of the structures of the isolated substances (1 and 2), as well as the substances identified in mixtures (3-5), was given by 1 H and 13 C NMR spectra analysis and comparison with literature data [15][16][17][18][19] . Identification of substance 2 was also was given by DEPT-135 and correlation maps COSY, HMBC e HSQC analysis and comparison to literature data [16] .…”

Section: Results and Discussion Phytotoxic Effects Of Tephrosia Cinermentioning

confidence: 99%

Identified Substances from the Leaves of Tephrosia cinerea (Leguminoseae) Crude Extracts and their Phytotoxic Effects

Filho¹,

Santos²,

Guilhon³

et al. 2017

Int. J. Life. Sci. Scienti. Res.

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ABSTRACT-This research evaluated the phytotoxic effect of the hexane (H.E), ethyl acetate (EtOAc.E) and methanolic (MeOH.E) crude extracts of the Tephrosia cinerea leaves on the seed germination of seeds using two weed species, Mimosa pudica (Malícia) and Senna obtusifolia (Mata-pasto), as test plants. The compounds were isolated using classic chromatography techniques and the structural elucidation of the compounds was performed by 1 H and 13 C NMR (1D and 2D) techniques. The ethyl acetate and methanolic extracts of T. cinerea were the most active, as they inhibited the germination of seeds in 92.0% and 81.0% respectively of malícia and mata-pasto, the ethyl acetate extract inhibited germination by 81.0% and the methanolic extract by 32.0%. The chemical study led to isolation of cinnamic acid and rotenone from the ethyl acetate extract, and mixture containing triacylglycerol and β-sitosterol fatty acids from the hexane extract and the disaccharide trehalose from methanolic extract.

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“…С помощью баз данных Biological Magnetic Resonance Data Bank, HuMagnetic Resonance Data Bank, Human Metabolome Data Base и литературного анализа (Roslundet e и литературного анализа (Roslundet et al, 2008;�sychogios et al, 2011;Feng et al, 2013) путем сравнения спектров, полученных в отдельности для каждого вещества из баз данных, и экспериментальных (про-грамма, используемая для сравнения, написана на Delphi И.В. Коптюгом) были идентифицированы метаболиты, соответствующие наиболее интенсивным пи-кам в спектрах ЯМР.…”

Section: материалы и методыunclassified

NMR metabolic profiling of the liver following administrationof alcohol andthemushroom Ganoderma lucidum in rats

Крестина¹,

Шевелев²,

Коптюг³

et al. 2015

Vestn. VOGiS

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Complete assignments of the 1H and 13C chemical shifts and JH,H coupling constants in NMR spectra of d-glucopyranose and all d-glucopyranosyl-d-glucopyranosides

Cited by 205 publications

References 57 publications

Brönsted Acidic Ionic Liquid 1-(1-Propylsulfonic)-3-methylimidazolium-Chloride Catalyzed Hydrolysisof D-Cellobiose in Aqueous Medium

Brönsted Acidic Ionic Liquid 1-(1-Propylsulfonic)-3-methylimidazolium-Chloride Catalyzed Hydrolysisof D-Cellobiose in Aqueous Medium

Identified Substances from the Leaves of Tephrosia cinerea (Leguminoseae) Crude Extracts and their Phytotoxic Effects

NMR metabolic profiling of the liver following administrationof alcohol andthemushroom Ganoderma lucidum in rats

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