26184-96-3Relevant articles and documents
Unusual carbonate formation in saccharide synthesis
Baumes, Raymond L.,Bayonove, Claude L.,Cordonnier, Robert E.,Gunata, Yusuf Z.
, p. 331 - 340 (1989)
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Synthesis of 6-O-alpha-L-fucopyranosyl-D-galactose.
Matta,Johnson,Barlow
, p. 418 - 422 (1974)
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Enzymatic deglycosylation of flavonoids in deep eutectic solvents-aqueous mixtures: Paving the way for sustainable flavonoid chemistry
Weiz, Gisela,Braun, Lucas,Lopez, Rosana,De María, Pablo Domínguez,Breccia, Javier D.
, p. 70 - 73 (2016)
The low solubility of glycosylated flavonoids represents a hurdle to conduct efficient enzymatic deglycosylations in aqueous media. To overcome this drawback, environmentally-unfriendly dimethylsulfoxide (DMSO) is typically used as co-solvent. Using a specific diglycosidase from Acremonium sp. DSM24697 for the deglycosylation of the rutinosylated flavonoid (hesperidin) as model reaction, this communication explores the use of (non-hazardous and biodegradable) deep eutectic solvents (DESs) as co-solvents in flavonoid biocatalysis. The enzymatic deglycosylation was observed when DES composed of choline chloride and glycerol or ethylene-glycol was used at proportions of up to 40% (DES-Buffer, v/v), displaying a promising framework to combine enhanced flavonoid solubilities and high enzymatic activities. The deglycosylation activity significantly increased when the single DES components - glycerol and ethylene-glycol - were added (e.g. 140% of enzyme activity at glycerol at 40% v/v), whereas deleterious effects were observed when choline chloride was solely added, presumably due to its chaotropic effect. Future research opportunities may be envisaged in the genetic design to evolve more robust biocatalysts, and in tailoring DES to deliver more enzyme-compatible solvents.
Access to both anomers of rutinosyl azide using wild-type rutinosidase and its catalytic nucleophile mutant
Bojarová, Pavla,Brodsky, Katerina,Halada, Petr,Jav?rková, Hana,K?en, Vladimír,Konvalinková, Dorota,Kotik, Michael,Pelantová, Helena
, (2020/10/20)
Rutinosidases hydrolyze β-rutinosylated flavonoids. As retaining glycosidases they also have a transglycosylation activity. Here we show that two newly identified wild-type rutinosidases, which are members of the glycoside hydrolase family 5–23, are capable of glycosylation of an inorganic azide with rutin as a glycosyl donor, yielding rutinosyl β-azide. On the other hand, rutinosyl α-azide was synthesized by the catalytic nucleophile mutant of the rutinosidase from Aspergillus niger, which also belongs to GH5–23. Thus, we were able to synthesize at a preparatory scale both anomers of rutinosyl azide from rutin using either wild-type or mutant rutinosidases of GH5–23.
Dracopalmaside, a New Flavonoid from Dracocephalum palmatum
Olennikov,Chirikova
, p. 1067 - 1069 (2016/02/18)
Phytochemical studies of the aerial part of Dracocephalum palmatum (Lamiaceae) isolated the new flavonoid dracopalmaside that was identified based on UV, MS, and NMR spectral data as luteolin-7,4′-di-O-α -Lrhamnopyranosyl-(1→6)-β-D-glucopyranoside (luteolin-7,4′-di-O-rutinoside) and the two known compounds cynarotriside and luteolin-7,4′-di-O-glucoside.