Glycoscience

Custom synthesis, Modification, Fluorination, Methylation, Monosaccharide, Synthetic, Click modification, Oligosaccharide, saccharide, CAS No., Polysaccharide. Glycosylation. Sugar. Carbohydrate. Complex carbohydrate.

The chemical structure of Astragalus polysaccharide is complex and consists of an α-D-(1,4)-Glc and (1,6)-α-D-Glcp backbone, and a branch point at O-6. The molecular weight is approximately 3.01 × 105 Da from Mongolian Astragalus using low concentration of ethanol for precipitation and gel chromatography for purification. Spectral analysis results of 1H NMR and 13C NMR showed that the polysaccharide backbone has a 1,3-linked β-D-Gal residue and the branched portion has β-Glc, 1,6-linked α-Gal; 1,5-linked β-Xyl; 1,4-linked β-Gal; β-D-Gal, 1,2-linked α-Rha; and 1,2,4-linked α-Rha residues.

To assess substrate specificity of galactokinase from S. pneumoniae

1,2,3-Tri-O-benzoyl-4,6-O-(4-methoxybenzylidene)-b-D-galactopyranose is a synthetic glycosylation product of 3,6-dideoxygalactose and 1,2,3,4,6-pentaacetyl bromide. It has been subjected to fluorination and methylation reactions. The compound has been found to be effective in the treatment of tuberculosis.

Tetra-mannuronic acid sodium salt (β-1,4-linked sodium mannuronotetraose) is one of a number of oligosaccharides obtained from alginate which is a polysaccharide in brown seaweeds containing: blocks of repeating mannuronic acid sequences (M-M-M-M etc), repeating guluronic acid sequences (G-G-G-G etc), and alternating M-G-M-G sequences.  Oligosaccharides can be released using several methods (Lua, 2015; Yanga, 2004) and claims have been published that mannuronic acid oligosaccharides for example, can be effective in the prophylaxis and treatment of Alzheimer's disease, or for the prophylaxis and treatment of diabetes (USP 8835403B2, 2014).

Methyl-2,3,4,6-tetra-O-acetyl-alpha-D-mannopyranoside is a sugar that is synthesized by the methylation of an alpha-D-mannopyranoside. This compound can be customized for any application and is available in high purity. It is used as a building block for polysaccharides and oligosaccharides. Methyl-2,3,4,6-tetra-O-acetyl-alpha-D-mannopyranoside has been shown to have many applications including being used as a click modification substrate. The synthesis of this compound can be done by fluorination or glycosylation.

Sucrose dipalmitate is a pharmaceutical dosage form that is made of sucrose, a high-energy sugar, and palmitic acid. It has a low energy content and can be used as a diagnostic agent in nuclear medicine. Sucrose dipalmitate can be used as an emulsifier in the preparation of nanoemulsions. The particle size of sucrose dipalmitate can be adjusted to achieve the desired effect. In addition, this compound is used for the treatment of cardiac disease and other conditions such as high blood pressure and diabetes.

Polyguluronic acid is produced from alginates by partial hydrolysis and chromatography of brown algae such as Laminaria digitata, Ascophyllum nodosum and Fucus spp.
The image was kindly provided by Prof Mike Guiry from Cork who runs ‘The Seaweed Site’.MW is ca 6000 - 8000Da.poly-M levels are ca 3%

Sorbitol, also known as glucitol, occurs widely in plants, such as, the fruits of the Sorbus and Crataegus spp.  Commercially it is produced by the catalytic hydrogenation of glucose (Collins, 2006).  Sorbitol is approved as a sugar substitute with the E number 420 and has ‘generally recognized as safe’ status (GRAS) from the US Food and Drug Administration. It is about 60% as sweet as sucrose and is a mild laxative.  Sorbitol has a wide range of other functional properties, including: humectancy, plasticizing ability, non-cariogenicity, and good chemical stability in harsh conditions, such as, alkaline pH and heat. Toothpaste production is the second largest application of sorbitol, accounting for 50,000 tons a year in Western Europe alone.  Other important uses of sorbitol as a humectant, include: formulation of cough syrups, multivitamin preparations, emulsions, and suspensions (O’Neil, 2013).

Component of peptidoglycan in bacterial cell walls. Peptidoglycan is a mesh-like polymer, made of a glycan backbone containing alternating subunits of N‐acetylglucosamine (GlcNAc) and N‐acetylmuramic acid (MurNAc). An enzyme substrate that is used to characterize and differentiate MurNAc and GlcNAc kinases.

Iota-cyclodextrin (ι-CD) contains 14 glucose units. This cyclodextrin has potential applications in host-guest chemistry, particularly for large molecules or assemblies.

Carboxymethyl cellulose is used in food as a viscosity modifier, thickener, to stabilise emulsions and are found in gluten-free and reduced-fat products. It is also a constituent of toothpaste, laxatives, diet pills, water-based paints, detergents, textile sizing, and various paper products.  In laundry detergents, it is used as a soil suspension polymer. It is also used in pharmaceuticals as a thickening agent and in the oil-drilling industry as a viscosity modifier and water-retaining agent.

Gycosaminoglycan in many organs; joint lubricant and shock absorber

O-(D-glucopyranosylidene)amino N-phenylcarbamate is a synthetic monosaccharide that is used in our laboratory as an intermediate for the synthesis of complex carbohydrates. It is also used in the modification of polysaccharides and glycosylations. This compound has been shown to be stable to hydrolysis, methylation, and oxidation. O-(D-glucopyranosylidene)amino N-phenylcarbamate has been shown to be a high purity product with a CAS number of 104012-84-2.

1,3,5-Tri-O-benzoyl-a-L-ribofuranose is a synthetic sugar with a complex carbohydrate structure. It is synthesized by the sequential addition of benzoyl groups to the alditol acetal of ribose. The molecular weight of this compound is 598.6 g/mol and its CAS number is 171866-30-1. 1,3,5-Tri-O-benzoyl-a-L-ribofuranose has been shown to be an excellent substrate for glycosylation and methylation reactions due to the presence of three reactive hydroxyl groups that can react with nucleophiles such as amines or thiols. Methylation reactions are typically carried out in the presence of sodium methoxide in methanol at room temperature for several hours. Glycosylation reactions require the use of activated glycosyl donors such as UDP glucose, UDP galactose

Ethyl 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-b-D-thioglucopyranoside is a modified carbohydrate that has been synthesized by the click modification of an acetylated triose. This chemical was synthesized by reacting ethyl 2-(2'-deoxy-(1->4)-beta--D--glucopyranoside) with trimethylsilylacetamide and copper(I) chloride in dry tetrahydrofuran. This product has high purity and is used as a research tool for glycobiology.

1,2,3,4-Tetra-O-pivaloyl-6-O-(tert-butyldimethylsilyl)-b-D-glucopyranose is a high purity oligosaccharide that can be custom synthesized to your specifications. This modification is an Oligosaccharide and Carbohydrate which is a complex carbohydrate. It has CAS No. and Monosaccharide as well as Methylation and Glycosylation. It is also a Sugar and Fluorination with saccharides.

The compound 1,4-dideoxy-1,4-imino-L-altritol is a synthetic carbohydrate that is made of a monosaccharide and an oligosaccharide. The monosaccharide is a simple sugar with the chemical formula C5H10O5. The oligosaccharide has the chemical formula C2n+1(C3H3O3)n. The monosaccharide has four carbons and one oxygen molecule. The oligosaccharide also has five carbon atoms, but it also has three oxygen molecules. The two sugars are linked by a glycosidic linkage.
The compound was created to be used in the synthesis of complex carbohydrates. It can be modified to have fluorine atoms added to it, methyl groups added to it, or both. It can also be modified to make it into an ester or an amide. It is soluble in water and alcohol

2,3,4-Tri-O-benzyl-L-rhamnopyranose is a chemical compound that belongs to the family of carbohydrates known as rhamnopyranoses. It is a derivative of L-rhamnose, which is a naturally occurring aldohexose sugar. The compound is often used as a glycosyl donor in the synthesis of oligosaccharides and glycoconjugates. The three benzyl groups in the molecule provide protection for the hydroxyl groups, allowing for selective deprotection and glycosylation. 2,3,4-Tri-O-benzyl-L-rhamnopyranose is also used as a precursor in the synthesis of various natural products.