29847-23-2

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Chemical Properties

White Solid

InChI:InChI=1/C8H14N4O5/c1-3(14)10-5-7(16)6(15)4(2-13)17-8(5)11-12-9/h4-8,13,15-16H,2H2,1H3,(H,10,14)/t4-,5-,6-,7-,8-/m1/s1

Upstream product

• 6205-69-2 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl azide 
• 10378-06-0 2-methyl-(3,4,6-tri-O-acetyl-1,2-dideoxy-α-D-glucopyranoso)[1,2-d]-2-oxazoline 
• 22854-00-8 2-methyl-(1,2-dideoxy-α-D-glucopyranoso)-[2,1-d]-2-oxazoline 
• 7512-17-6 N-Acetyl-D-glucosamine 
• 3006-60-8 2-acetamido-3,4,6-tri-O-acetyl-D-glucopyranosyl acetate 
• 824985-67-3 C₁₂H₁₉NO₈ 
• 70749-28-9 2-acetamido-1,3,4,6-tetra-O-acetyl-2-deoxy-β-D-glucopyranose 
• 14131-63-6 D-glucosamine hydrochloride 
• 14131-68-1 N-acetyl-D-glucosamine 
• 3068-34-6 2-Acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl chloride 
• 51533-00-7 2-acetylamino-3,4,6-triacetyl-2-deoxy-α-D-glucopyranosyl bromide 
• 53942-44-2 2-acetamido-2-deoxy-3,4,5,6-tetra-O-acetyl-aldehydo-D-glucose 
• 97423-82-0 3,4,6-tri-O-acetyl-2-amino-2-deoxy-β-D-glucopyranosyl azide 
• 112117-91-6 2-isopropylidenamino-2-deoxy-β-D-glucopyranosyl azide 

Downstream Products

• 246512-98-1 2-acetamido-6-O-tert-butyldiphenylsilyl-2-deoxy-β-D-glucopyranosyl azide 
• 214467-60-4 azido 3,4,6-tri-O-benzyl-2-N-acetylamino-2-deoxy-β-D-glucopyranoside 
• 6205-72-7 1-N-acetyl-2-acetamido-2-deoxy-β-D-glucopyranosylamine 
• 1429306-51-3 2-acetamido-6-O-tert-butyldiphenylsilyl-3,4-di-O-benzoyl-2-deoxy-β-D-glucopyranosyl azide 
• 1429306-56-8 6-O-(2-trifluoroacetamido-3,4,6-tri-O-benzoyl-2-deoxy-β-D-glucopyranosyl)-2-acetamido-3,4-di-O-benzoyl-2-deoxy-β-D-glucopyranosyl azide 
• 1429306-57-9 6-O-(2-trifluoroacetamido-6-O-tert-butyldiphenylsilyl-3,4-di-O-benzoyl-2-deoxy-β-D-glucopyranosyl)-2-acetamido-3,4-di-O-benzoyl-2-deoxy-β-D-glucopyranosyl azide 
• 1429306-58-0 6-O-(2-trifluoroacetamido-3,4-di-O-benzoyl-2-deoxy-β-D-glucopyranosyl)-2-acetamido-3,4-di-O-benzoyl-2-deoxy-β-D-glucopyranosyl azide 

Relevant academic research and scientific papers

A (13)C-N.M.R. INVESTIGATION OF GLYCOSYL AZIDES AND OTHER AZIDO SUGARS: STEREOCHEMICAL INFLUENCES ON THE ONE-BOND (13)C-(1)H COUPLING CONSTANTS

Unambigous (13)C assignments have been obtained, using 2D-n.m.r. techniques, for several glycosyl azides, 6-deoxyglucosyl azides, 2-acylamino-2-deoxyglycosyl azide, and some 2- and 3-azido monosaccharide derivatives.For non-anomeric C-H-bonds the 1JC,Heq. values are 4-9 Hz larger than the 1JC,Hαx. values.A substituent (hydroxyl, acetoxyl, alkoxyl, azido, etc.) in 1,3-diaxial relationship with Hax. significantly increases the value of 1JC,Hαx..Bond-angle distortions in the fused-ring bicyclic systems of some isopropylidene derivatives result in 1JC,Hαx. values being larger than 1JC,Heq. values.Electronic and stericeffects of substituents at non-anomeric carbons may alter the 1JC,H values for anomeric carbons to such an extent that they may no longer be useful for diagnosing anomeric configuration.Bond-angle deformations also influence the (13)C chemical shift differences in α- and β-anomers at C-5 and, to a lesser extent, at C-3.

Site-specific glycoconjugation of protein via bioorthogonal tetrazine cycloaddition with a genetically encoded trans -cyclooctene or bicyclononyne

Efficient access to proteins modified site-specifically with glycans is important in glycobiology and for therapeutic applications. Herein, we report a biocompatible protein glycoconjugation by inverse demand Diels-Alder reaction between tetrazine and tra

Radical-Mediated Acyl Thiol-Ene Reaction for Rapid Synthesis of Biomolecular Thioester Derivatives

The thiol-ene ‘click’ reaction has emerged as a versatile process for carbon–sulfur bond formation with widespread applications in chemical biology, medicinal chemistry and materials science. Thioesters are key intermediates in a wide range of synthetic and biological processes and efficient methods for their synthesis are of considerable interest. Herein, we report the first examples of acyl-thiol-ene (ATE) for the synthesis of biomolecular thioesters, including peptide, lipid and carbohydrate derivatives. A key finding is the profound effect of the amino acid side chain on the outcome of the ATE reaction. Furthermore, radical generated thioesters underwent efficient S-to-N acyl transfer and desulfurisation to furnish ‘sulfur-free’ ligation products in an overall amidation process with diverse applications for chemical ligation and bioconjugation.

Synthesis of Asparagine Derivatives Harboring a Lewis X Type DC-SIGN Ligand and Evaluation of their Impact on Immunomodulation in Multiple Sclerosis

The protein myelin oligodendrocyte glycoprotein (MOG) is a key component of myelin and an autoantigen in the disease multiple sclerosis (MS). Post-translational N-glycosylation of Asn31 of MOG seems to play a key role in modulating the immune response towards myelin. This is mediated by the interaction of Lewis-type glycan structures in the N-glycan of MOG with the DC-SIGN receptor on dendritic cells (DCs). Here, we report the synthesis of an unnatural Lewis X (LeX)-containing Fmoc-SPPS-compatible asparagine building block (SPPS=solid-phase peptide synthesis), as well as asparagine building blocks containing two LeX-derived oligosaccharides: LacNAc and Fucα1-3GlcNAc. These building blocks were used for the glycosylation of the immunodominant portion of MOG (MOG31-55) and analyzed with respect to their ability to bind to DC-SIGN in different biological setups, as well as their ability to inhibit the citrullination-induced aggregation of MOG31-55. Finally, a cytokine secretion assay was carried out on human monocyte-derived DCs, which showed the ability of the neoglycopeptide decorated with a single LeX to alter the balance of pro- and anti-inflammatory cytokines, inducing a tolerogenic response.

Rapid glycoconjugation with glycosyl amines

Conjugation of unprotected carbohydrates to surfaces or probes by chemoselective ligation reactions is indispensable for the elucidation of their numerous biological functions. In particular, the reaction with oxyamines leading to the formation of carbohydrate oximes which are in equilibrium with cyclic N-glycosides (oxyamine ligation) has an enormous impact in the field. Although highly chemoselective, the reaction is rather slow. Here, we report that the oxyamine ligation is significantly accelerated without the need for a catalyst when starting with glycosyl amines. Reaction rates are increased up to 500-fold compared to the reaction of the reducing carbohydrate. For comparison, aniline-catalyzed oxyamine ligation is only increased 3.8-fold under the same conditions. Glycosyl amines from mono- and oligosaccharides are easily accessible from reducing carbohydrates via the corresponding azides by using Shoda's reagent (2-chloro-1,3-dimethylimidazolinium chloride, DMC) and subsequent reduction. Furthermore, glycosyl amines are readily obtained by enzymatic release from N-glycoproteins making the method suited for glycomic analysis of these glycoconjugates which we demonstrate employing RNase B. Oxyamine ligation of glycosyl amines can be carried out at close to neutral conditions which makes the procedure especially valuable for acid-sensitive oligosaccharides. This journal is

Glycoconjugated Metallohelices have Improved Nuclear Delivery and Suppress Tumour Growth In Vivo

Monosaccharides are added to the hydrophilic face of a self-assembled asymmetric FeII metallohelix, using CuAAC chemistry. The sixteen resulting architectures are water-stable and optically pure, and exhibit improved antiproliferative selectivity against colon cancer cells (HCT116 p53+/+) with respect to the non-cancerous ARPE-19 cell line. While the most selective compound is a glucose-appended enantiomer, its cellular entry is not mainly glucose transporter-mediated. Glucose conjugation nevertheless increases nuclear delivery ca 2.5-fold, and a non-destructive interaction with DNA is indicated. Addition of the glucose units affects the binding orientation of the metallohelix to naked DNA, but does not substantially alter the overall affinity. In a mouse model, the glucose conjugated compound was far better tolerated, and tumour growth delays for the parent compound (2.6 d) were improved to 4.3 d; performance as good as cisplatin but with the advantage of no weight loss in the subjects.

Core fucosylation of maternal milk N-glycan evokes B cell activation by selectively promoting the L-fucose metabolism of gut bifidobacterium spp. and lactobacillus spp

The maternal milk glycobiome is crucial for shaping the gut microbiota of infants. Although high core fucosylation catalyzed by fucosyltransferase 8 (Fut8) is a general feature of human milk glycoproteins, its role in the formation of a healthy microbiota has not been evaluated. In this study, we found that the core-fucosylated N-glycans in milk of Chinese mothers selectively promoted the colonization of specific gut microbial groups, such as Bifidobacterium spp. and Lactobacillus spp. in their breast-fed infants during lactation. Compared with Fut8+/+ (WT) mouse-fed neonates, the offspring fed by Fut8+/-maternal mice had a distinct gut microbial profile, which was featured by a significant reduction of Lactobacillus spp., Bacteroides spp., and Bifidobacterium spp. and increased abundance of members of the Lachnospiraceae NK4A136 group and Akkermansia spp. Moreover, these offspring mice showed a lower proportion of splenic CD19+ CD69+ B lymphocytes and attenuated humoral immune responses upon ovalbumin (OVA) immunization. In vitro studies demonstrated that the chemically synthesized core-fucosylated oligosaccharides possessed the ability to promote the growth of tested Bifidobacterium and Lactobacillus strains in minimal medium. The resulting L-fucose metabolites, lactate and 1,2-propanediol, could promote the activation of B cells via the B cell receptor (BCR)-mediated signaling pathway. IMPORTANCE This study provides novel evidence for the critical role of maternal milk protein glycosylation in shaping early-life gut microbiota and promoting B cell activation of neonates. The special core-fucosylated oligosaccharides might be promising prebiotics for the personalized nutrition of infants.

Combining Click Reactions for the One-Pot Synthesis of Modular Biomolecule Mimetics

Here, we report on the first combined one-pot use of the two so-called "click reactions": The thiol-ene coupling and the copper-catalyzed alkyne-azide cycloaddition. These reactions were employed in an alternating and one-pot fashion to combine appropriately functionalized monomeric carbohydrate building blocks to create mimics of trisaccharides and tetrasaccharides as single anomers, with only minimal purification necessary. The deprotected oligosaccharide mimics were found to bind both plant lectins and human galectin-3.

A Tripeptide Approach to the Solid-Phase Synthesis of Peptide Thioacids and N-Glycopeptides

A general and robust method for the incorporation of aspartates with a thioacid side chain into peptides has been developed. Pseudoproline tripeptides served as building blocks for the efficient fluorenylmethyloxycarbonyl (Fmoc) solid-phase synthesis of t

Synthesis and self-assembling properties of 4,6?O-benzylidene acetal protected D-glucose and D-glucosamine β?1,2,3?triazole derivatives

Sugar based low molecular weight gelators (LMWGs) are useful small molecules that can form reversible supramolecular gels with many applications. Selective functionalization of common monosaccharides has resulted in several classes of effective LMWGs. Rec