62774-10-1Relevant academic research and scientific papers
Regio- and chemoselective reductive cleavage of 4,6-O-benzylidene-type acetals of hexopyranosides using BH3·THF-TMSOTf
Daragics, Katalin,Fügedi, Péter
experimental part, p. 2914 - 2916 (2009/09/06)
Benzylidene-type cyclic acetals of carbohydrates undergo efficient reductive ring opening using BH3·THF and a catalytic amount of TMSOTf at room temperature. 4,6-O-Benzylidene-hexopyranosides afford the corresponding 4-O-benzyl ethers exclusive
Synthesis of the α-D-GlcpA-(1 → 3)-α-L-Rhap-(1 → 2)-L-Rha trisaccharide isolated from the cell wall hydrolyzate of the green alga, Chlorella vulgaris
Sajtos, Ferenc,Hajko, Janos,Koever, Katalin E,Liptak, Andras
, p. 253 - 259 (2007/10/03)
The title trisaccharide was synthesized from 6-O-acetyl-2,3,4-tri-O-benzyl-α-D-glucopyranosyl chloride (10), ethyl 2,4-di-O-benzyl-1-thio- (5) and benzyl 3,4-di-O-benzyl-α-L-rhamnopyranoside (9). The disaccharide 11 obtained from compounds 5 and 10 was used as the glycosyl donor to glycosylate the rhamnopyranoside derivative 9 having free OH-2 using the NIS-AgOTf-mediated glycosylation methodology. Zemplen deacetylation of the trisaccharide 12 resulted in the 6″-OH derivative (13), which was selectively oxidized with CrO3 to the uronic acid derivative 14. The benzyl groups were removed by catalytic hydrogenolysis to furnish the target trisaccharide (1).
A practical synthesis of mannosaminyl-β(1 → 4)-glucosyl-α(1 → 2)-rhamnose, the trisaccharide repeating unit of a Streptococcus pneumoniae capsular polysaccharide
Kaji,Lichtenthaler,Osa,Takahashi,Zen
, p. 2401 - 2408 (2007/10/02)
An efficient chemical synthesis is described for the title trisaccharide repeating unit of the capsular polysaccharide of Streptococcus pneumoniae Type 19F. The key intermediate was a well-accessible indirect β-D-mannosaminyl donor, i.e. 2-(benzoyloxyimin
Synthesis and absolute configuration of lepidimoide, a high potent allelopathic substance from mucilage of germinated cress seeds
Kosemura,Yamamura,Kakuta,Mizutani,Hasegawa
, p. 2653 - 2656 (2007/10/02)
Lepidimoide (1), 1,2-cis-linked dissacharide, was synthesized from D-glucose and α-L-rhamnose for determination of the absolute configuration.
SYNTHESIS, AND CARBON-13 N.M.R. STUDY, OF O-α-L-RHAMNOPYRANOSYL-(13)-O-α-L-RAHMNOPYRANOSYL-(12)-L-RHAMNOPYRANOSE AND O-α-L-RHAMNOPYRANOSYL-(13)-O-α-L-RHAMNOPYRANOSYL-(13)-L-RHAMNOPYRANOSE, CONSTITUENTS OF BACTERIAL, CELLWALL POLYSACCHARIDES
Pozsgay, Vince,Nanasi, Pal,Neszmelyi, Andras
, p. 215 - 232 (2007/10/02)
O-α-L-Rhamnopyranosyl-(13)-L-rhamnopyranose (19) and O-α-L-rhamnopyranosyl-(12)-L-rhamnopyranose were obtained by reaction of benzyl 2,4- (7) and 3,4-di-O-benzyl-α-L-rhamnopyranoside (8) with 2,3,4-tri-O-acetyl-α-L-rhamnopyranosyl bromide, followed
