133940-44-0

Upstream product

• 100-51-6 benzyl alcohol 
• 136945-13-6 [(2R,3S,4R,5R)-3,4-diacetoxy-6-hydroxy-5-(2,2,2-trichloroethoxycarbonylamino)tetrahydropyran-2-yl]methyl acetate 
• 220645-20-5 p-methylphenyl 3,4,6-tri-O-acetyl-2-deoxy-1-thio-2-(2,2,2-trichloroethyloxycarbonylamino)-β-D-glucopyranoside 
• 1384536-77-9 3,4,6-tri-O-acetyl-2-amino-2-deoxy-1-O,2-N-[(2,2,2-trichloroethoxy)methylylidene]-α-D-glucopyranose 
• 67124-60-1 3,4,6-Tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-α-D-glucopyranosyl bromide 
• 187022-49-7 (2R,3S,4R,5R,6S)-2-(acetoxymethyl)-6-(phenylthio)-5-(((2,2,2-trichloroethoxy)carbonyl)amino)tetrahydro-2H-pyran-3,4-diyl diacetate 
• 172490-46-9 2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-D-glucopyranose 
• 108-24-7 acetic anhydride 
• 133940-44-0 benzyl 3,4,6-tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-glucopyranoside 

Downstream Products

• 67124-60-1 3,4,6-Tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-α-D-glucopyranosyl bromide 
• 1055335-23-3 benzyl 2-deoxy-2-(2,2,2-trichloroethoxy)carbonylamino-β-D-glucopyranoside 
• 206751-91-9 benzyl 2-acetamido-2-deoxy-3,6-di-O-pivaloyl-β-D-glucopyranoside 
• 133339-64-7 Cyclohexylmethyl 3,4,6-tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-α-D-glucopyranoside 

Relevant academic research and scientific papers

Mild and selective O-glycosylations of primary alcohols with the thioglucosaminide derivative promoted by N-iodosuccinimide and HBF4-adosrobed on silica gel

Selective glycosylations of primary alcohols with the thioglucosaminide 1 are achieved by using NIS and HBF4-SiO2- HBF4-SiO2 is a mild Bronsted acid which requires primary alcohols or phenols to effectively activate 1 with NIS at rt. A wide range of functional groups are tolerated under these conditions.

Chemical synthesis of 4-azido-β-galactosamine derivatives for inhibitors of N-acetylgalactosamine 4-sulfate 6-O-sulfotransferase

Chondroitin sulfate E (CS-E) plays a crucial role in diverse processes ranging from viral infection to neuroregeneration. Its regiospecific sulfation pattern, generated by N-acetylgalactosamine 4-sulfate 6-O-sulfotransferase (GalNAc4S-6ST), is the main structural determinant of its biological activity. Inhibitors of GalNAc4S-6ST can serve as powerful tools for understanding physiological functions of CS-E and its potential therapeutic leads for human diseases. A family of new 4-acylamino-β-GalNAc derivatives and 4-azido-β-GalNAc derivatives were synthesized for their potential application as inhibitors of GalNAc4S-6ST. The target compounds were evaluated for their inhibitory activities against GalNAc4S-6ST. The results revealed that 4-pivaloylamino- and 4-azido-β-GalNAc derivatives displayed evident activities against GalNAc4S-6ST with IC50 value ranging from 0.800 to 0.828?mM. They showed higher activities than benzyl D-GalNAc4S that was used as control.

Synthesis of some 2-alkoxy glyco-[2,1-d]-2-oxazolines and evaluation of their glycosylation reactivity

The synthesis of the title compounds using intramolecular nucleophilic substitution reactions in the molecules of the corresponding 2-alkoxycarbonylamino-2-deoxy glucosyl halides was studied. It was found that in contrast to the 2-alkyl (aryl) glyco-[2,1-d]-2-oxazolines, the synthesis of the target 2-alkoxy glyco-[2,1-d]-2-oxazolines was possible only in highly basic media. The synthesized 2-alkoxy oxazoline derivatives turned out to be active glycosyl donors and were used for stereoselective 1,2-trans glycosylation reactions catalyzed by weak protic acid under very mild conditions, thus preventing anomerization and other side reactions. As a result of this glycosylation, the glycoside and oligosaccharide derivatives containing urethane N-protecting groups were formed.

Sugar-assisted glycopeptide ligation with complex oligosaccharides: Scope and limitations

We have previously shown sugar-assisted ligation (SAL) to be a useful method for the convergent construction of glycopeptides. However to date SAL has only been carried out on systems where the thiol auxiliary is attached to a monosaccharide. For SAL to be truly applicable to the construction of fully elaborated glycopeptides and glycoproteins, it must be possible to carry out the reaction when the thiol auxiliary is attached to more elaborate sugars, as these are frequently what are observed in nature. Here we examine the effects of glycosylation at C-3, C-4, and C-6 of the C-2 auxiliary-containing glycan. Model glycopeptides where synthesized chemoenzymatically and reacted with peptide thioesters used in our previous work. These studies reveal that SAL is sensitive to extended glycosylation on the auxiliary-containing sugar. While it is possible to carry out SAL with extended glycosylation at C-4 and C-6, the presence of glycosylation at C-3 prevents the ligation from occurring. Additionally, with glycosylation at C-4 the ligation efficiency is affected by the identity of the N-terminal AA, while the nature of the C-terminal residue of the peptide thioester does not appear to affect ligation efficiency. These studies provide useful guidelines in deciding when it is appropriate to use SAL in the synthesis of complex glycopeptides and glycoproteins and how to choose ligation junctions for optimal yield.

Direct transformation of O-glycoside into glycosyl bromide with the combination of trimethylsilyl bromide and zinc bromide

A novel direct transformation of O-glycoside into glycosyl bromide by using trimethylsilyl bromide and zinc bromide has been developed. Treatment of various glycosides (3a-5a, 10, 12 and 14) with trimethylsilyl bromide and zinc bromide in dichloromethane afforded the glycosyl bromides (6, 11, 13 and 15) in 53, 85, 94, 47, 41 and 40% yields, respectively.