20298-34-4

Upstream product

• 20298-35-5 N-acetylneuraminic acid methyl ester 
• 108-24-7 acetic anhydride 
• 57-88-5 cholesterol 
• 91041-78-0 methyl N-acetyl-4,7,8,9-tetra-O-acetyl-2-fluoro-β-D-neuraminate 
• 91041-78-0 methyl N-acetyl-4,7,8,9-tetra-O-acetyl-2-fluoro-α-D-neuraminate 
• 155155-64-9 (4S,5R,6R)-4-Acetoxy-5-acetylamino-2-phenylsulfanyl-6-((1S,2R)-1,2,3-triacetoxy-propyl)-tetrahydro-pyran-2-carboxylic acid methyl ester 
• 24850-33-7 allyltributylstanane 
• 6813-81-6 N-acetyl neuraminic acid 

Downstream Products

• 125532-28-7 1-phenyl-1H-tetrazol-5-yl(5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-D-galacto-2-nonulopyranoside)thionate 
• 125532-26-5 methyl <1-phenyl-1H-tetrazol-5-yl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-2-thio-D-glycero-β-D-galacto-2-nonulopyranosid>onate 
• 125532-26-5 methyl <1-phenyl-1H-tetrazol-5-yl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-2-thio-D-glycero-α-D-galacto-2-nonulopyranosid>onate 
• 170298-66-5 methyl <5-acetamido-4,7,8,9-tetra-O-acetyl-2-(phenoxycarbonyloxy)-3,5-dideoxy-β-D-glycero-D-galacto-2-nonulopyranosyl>onate 
• 144240-36-8 methyl (methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-2-thio-D-glycero-D-galacto-2-nonulopyranosid)onate 
• 90124-30-4 methyl O--(2->6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside 
• 109681-25-6 methyl O--(2->6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside 
• 874904-90-2 methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-D-galacto-2-nonulopyranosonate 2-(N-phenyl)trifluoroacetimidate 
• 1374853-99-2 C₃₂H₄₅NO₁₃ 
• 1374838-89-7 C₃₃H₄₇NO₁₃ 
• 1374853-98-1 sodium (3-methyl-5-phenylpentanyl-5-acetamido-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranoside)onate 
• 345209-46-3 (4S,5R,6R)-4-Acetoxy-5-acetylamino-6-((1S,2R)-1,2,3-triacetoxy-propyl)-2-((2R,3R,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-2-carboxylic acid methyl ester 
• 96520-22-8 benzyl O--(2->3)-O-(2,6-di-O-benzyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside 
• 170298-69-8 methyl 2,3,4-tri-O-benzoyl-6-O--β-D-galactopyranoside 

Relevant academic research and scientific papers

Chemical and enzymatic synthesis of high-affinity selectin ligands

Analogs of sialyl Lewis(X) have been synthesized chemically using donors of modified sialic acids. The sialic acids were obtained enzymatically by an aldolase reaction. The sLe(x) tetrasaccharides modified at C-2 of the GlcNAc moiety and at C-5 of the sialic acid residue were tested as inhibitors for E- and P-selectins. Up to 12-fold higher inhibitory potency was found for the lyso-derivative of sLeX compared to the parent compound.

Facile synthesis of sugar lactols via bromine-mediated oxidation of thioglycosides

Synthesis of a variety of sugar lactols (hemiacetals) has been accomplished in moderate to excellent yields by using bromine-mediated oxidation of thioglycosides. It was found that acetonitrile is the optimal solvent for this oxidation reaction. This approach involving bromine as oxidant is superior to that using N-bromosuccinimide (NBS) which produces byproduct succinimide often difficult to separate from the lactol products.

An efficient synthesis of C3 C-alkylated Neu5Ac2en derivatives

C3-modified Neu5Ac2en derivatives can be used to study the flexible 150-loop region of influenza virus sialidases and also provide a new template for the development of next-generation sialidase inhibitors. This Letter describes an efficient synthetic route towards the large scale synthesis of C3 C-alkylated Neu5Ac2en derivatives. The key intermediate, a 3-eq-allyl-Neu5Ac derivative, is formed by stereoselective addition of the allyl group in an equatorial configuration at C3, regardless of the stereochemistry of the bromohydrin precursor.

Versatile acetylation of carbohydrate substrates with bench-top sulfonic acids and application to one-pot syntheses of peracetylated thioglycosides

Inexpensive and readily available sulfonic acids, p-toluenesulfonic acid, and sulfuric acid are versatile and efficient catalysts for the peracetylation of a broad spectrum of carbohydrate substrates in good yield and in a practical time frame. Three appealing features in sulfonic acid-catalyzed acetylation of free sugars were explored including (1) suppression of furanosyl acetate formation for d-galactose and l-fucose; (2) high yielding chemoselective acetylation of sialic acid under appropriate conditions; and (3) peracetylation of amino sugars with different amino protecting functions. Simple one-pot two step acetylation-thioglycosidation methods for the expeditious synthesis of p-tolyl per-O-acetyl thioglycosides were also delineated.

Highly efficient α-sialylation by virtue of fixed dipole effects of N-phthalyl group: Application to continuous flow synthesis of α(2-3)-and α(2-6)-Neu5Ac-Gal motifs by microreactor

Highly α-selective sialylation of sialic acid N- phenyltrifluoroacetimidate with various galactose and lactose acceptors has been achieved by introducing the C-5 N-phthalyl group on the donor. The "fixed dipole effect" of the N-phthalyl group was proposed to explain the high reactivity and α-selectivity. The microfluidic system was applied to the present α-sialylation, which is amenable to large-scale synthesis. The N-phthalyl group was removed by treatment with methylhydrazine acetate, for which protocol can be readily applied to the synthesis of a variety of sialic acid-containing oligosaccharides. (Chemical Equation Presented). Copyright Taylor & Francis Group, LLC.

Iodine : A versatile reagent in carbohydrate chemistry IV. Per-O-Acetylation, regioselective acylation and acetolysis

Iodine has been found to be an effective Lewis acid for promoting the per-O-acetylation of unprotected sugars. Under controlled conditions it can bring about regioselective acylation of carbohydrate derivatives. At higher concentration and with longer reaction times, iodine can effect the selective acetolysis of benzyl ether-protected primary hydroxyl groups. All of these reactions proceed in high yield, are easy to carry out and make use of readily available iodine, which is both cheap and easy to handle.