185549-85-3Relevant articles and documents
Synthetic method of rhodiola rosea active ingredient rosavin or rosarin
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Paragraph 0041-0044, (2020/01/03)
The present invention provides a synthetic method of rhodiola rosea active ingredient rosavin or rosarin. A convergent synthetic strategy is adopted, rosin is used as a starting material and modifiedinto sugar acceptors through protection and deprotection strategies, then sugar acceptors and sugar donors formed by arabinopyranose and arabinyl furanose in presence of an accelerator quickly and efficiently conduct synthesis of rosavin and rosarin. The related synthetic method is cheap and easy-to-obtain in raw materials and mild in reaction conditions, the obtained product is high in purity, and compared with currently reported linear synthesis strategy, the method has very good industrialization prospects.
Chemoenzymatic synthesis of n-hexyl and O-β-D-xylopyranosyl-(1→6) -β-D-glucopyranosides
Kishida, Masashi,Nishiuchi, Miho,Kato, Keisuke,Akita, Hiroyuki
, p. 1105 - 1108 (2007/10/03)
Direct β-glucosidation between 1,6-octanediol (5) and D-glucose (3) using the immobilized β-glucosidase (EC 3.2.1.21) from almonds with the synthetic prepolymer ENTP-4000 gave a mono-β-glucoside (6) in 61.4% yield, which was converted into the n-hexyl β-D
Reaction of sugar thiocyanates with Grignard reagents. New synthesis of thioglycosides
Pakulski, Zbigniew,Pierozynski, Donat,Zamojski, Aleksander
, p. 2975 - 2992 (2007/10/02)
Glycosyl thiocyanates having hydroxyl groups protected with acetyl or benzoyl groups react readily at -40°C with Grignard reagents to afford the corresponding alkyl or aryl thioglycosides in good yields. Monosaccharide derivatives having the SCN grouping at other positions form under similar conditions thioethers. Axial thiocyanates do not react. Elevated temperatures induce side reactions leading to mercaptans.