69557-83-1Relevant articles and documents
4,6-dideoxyglycosides, preparation method therefor and application of 4,6-dideoxyglycosides
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Paragraph 0029; 0030; 0031, (2017/08/29)
The invention discloses 4,6-dideoxypyranosides, a preparation method therefor and an application of the 4,6-dideoxypyranosides. The 4,6-dideoxypyranosides are prepared from rhamnose methylglycoside or mannose methylglycoside, which is cheap and readily available and serves as a starting raw material, through a simple and efficient reaction. An Orsellides C compound can be prepared through subjecting a D-type 4,6-dideoxypyranoside to a condensation reaction with 2,4-dihydroxyl-6-methyl benzoic acid in an organic solvent to form an ester bond. A condensation reaction system is DCC-DMAP or EDCI-DMAP, the use level of the condensation reaction system is 100% to 300% that of glycoside, a reaction solvent may be DMF, THF, CH2Cl2 or a mixed solvent of DMF-THF (v/v=1: 1), the reaction temperature is 20 DEG C to 80 DEG C, and the reaction time is 4 to 8 hours.
Enhanced site-selectivity in acylation reactions with substrate-optimized catalysts on solid supports
Tong, My Linh,Huber, Florian,Taghuo Kaptouom, Estelle S.,Cellnik, Torsten,Kirsch, Stefan F.
, p. 3086 - 3089 (2017/03/17)
A concept for site selective acylation of poly-hydroxylated substrates is presented where polymer-supported catalysts are employed: catalytically active DMAP units were combined with a library of small molecule peptides attached to the solid phase with the goal to identify substrate-optimized catalysts through library screening. For selected examples, we demonstrate how the optimized catalysts can convert “their” substrate with a markedly enhanced site-selectivity, compared to only DMAP. Due to the solid support, product purification is significantly simplified, and the peptidic catalysts can be easily reused in multiple cycles while conserving its efficiency.
Convergent synthesis of an octasaccharide fragment of the O-specific polysaccharide of Shigella dysenteriae type 1
Pozsgay, Vince,Pannell, Lewis
, p. 105 - 122 (2007/10/02)
A stereocontrolled, convergent synthesis is described of the linear octasaccharide methyl glycoside α-L-Rhap-(1 -> 2)-α-D-Galp-(1 -> 3)-α-GlcpNAc-(1 -> 3)-α-L-Rhap-(1 -> 3)-α-L-Rhap-(1 -> 2)-α-D-Galp-(1 -> 3)-α-D-GlcpNAc-(1 -> 3)-α-L-Rhap-OMe (11), which