2781-65-9

Upstream product

• 10236-47-2 naringin 
• 80832-23-1 benzyl 2-O-α-L-rhamnopyranosyl-β-D-galactopyranoside 
• 100201-60-3 sophoraflavoside I 
• 117181-24-5 benzyl 3-O-benzoyl-4,6-O-benzylidene-β-D-galactopyranoside 
• 5158-64-5 2,3,4-tri-O-acetyl-α-L-rhamnopyranosyl bromide 
• 55804-74-5 clitorin 
• 131279-12-4 rhamnosyl-(1<*>2)-O-6)> glucose 
• 80832-19-5 benzyl 4,6-O-benzylidene-2-O-α-L-rhamnopyranosyl-β-D-galactopyranoside 
• 80832-15-1 benzyl 3-O-benzoyl-4,6-O-benzylidene-2-O-(2,3,4-tri-O-acetyl-α-L-rhamnopyranosyl)-β-D-galactopyranoside 

Downstream Products

• 3615-41-6 L-Rhamnose 
• 50-99-7 D-glucose 
• 59-23-4 D-Galactose 
• 17073-41-5 Acetic acid (3R,4S,5S,6R)-2,5-diacetoxy-6-acetoxymethyl-3-((2S,3R,4R,5S,6S)-3,4,5-triacetoxy-6-methyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-4-yl ester 

Relevant academic research and scientific papers

Thermal Degradation of Glycosides, VI - Hydrothermolysis of Cardenolide and Flavonoid Glycosides

The hydrothermolysis of cardenolide and flavonoid glycosides is described.On heating with water or water/dioxane, cardenolide (1, 5, 11) and flavonoid glycosides (16, 20, 23, 27) are converted into their genuine aglycones and partially hydrolyzed products, together with saccharide components.Meanwhile, the glycosidic linkage of 2-deoxy sugar moieties in cardenolide glycosides is more readily cleaved than that of the common sugar moieties by means of hydrothermolysis.Therefore, hydrothermolysis of the uzarigenin triglycoside (13), bearing a 2-deoxy sugar moiety whichis directly attached to the aglycone, leads to selective cleavage of the sugar-aglycone linkage.The hydrothermolyzed products have been isolated by chromatography and their structures elucidated by spectroscopic methods. Key Words: Thermolysis / Degradation, thermal / Carbohydrates / Glycosides / Cardenolides / Steroids / Flavonoids

SYNTHESIS OF 2-O-α, 3-O-α, 3-O-β, AND 4-O-α-L-RHAMNOPYRANOSYL-D-GALACTOSE

Condensation of benzyl 3-O-benzoyl-4,6-O-benzylidene-, benzyl 2-O-benzoyl-4,6-O-benzylidene- (2), and benzyl 2,3,6-tri-O-benzyl-β-D-galactopyranoside, separately, with tri-O-acetyl-α-L-rhamnopyranosyl bromide gave mainly α-linked disaccharide derivatives.An appreciable proportion of the β-linked disaccharide was also abtained from 2.An anomalous deacylation reaction was found for the (1-->3)-linked disaccharide, and the partially benzoylated products were isolated and characterised.The anomeric configuration of each disaccharide was established on the basis of JC-1,H-1 values.The chemical shifts for the galactose moieties of the α and β-L-rhamnopyranosyl derivatives differed in a systematic way.

Studies on the Constituents of Apocynacae Plants. Gas Chromatography-Mass Spectrometric Determination of New Flavanoid Triglycosides from the Leaves of Cerbera manghas L.

Two new flavonol triglycosides, named manghaslin(I) and clitorin(II), were isolated from the leaves of Cerbera manghas L. (Apocynaceae).The structures of I and II were elucidated as quertecin-3-O-L-rhamnosyl-(12)-O6)> D-glucoside(I) and kaempferol-3-O-L-rhamnosyl-(12)-O-6)> D-glucoside(II), respectively, by chemical and gas chromatography-mass spectrometric studies.Keywords-Cerbera manghas L.; Apocynaceae; flavonol triglycerides; manghaslin; clitorin; gas chromatography-mass spectrometry; photohydrolysis; mass spectrum; methanolysis.