96323-28-3

Upstream product

• 53008-65-4 methyl 2,3,4-tri-O-benzyl-D-glucopyranoside 
• 343565-50-4 2-acetyl-3,4,6-tri-O-benzylglucopyranose-N-tosylcarbamate 
• 343565-51-5 2-acetyl-3,4,6-tri-O-benzylglucopyranose-N,N-(cyanomethyl)tosylcarbamate 
• 79218-68-1 2-O-acetyl-3,4,6-tri-O-benzyl-D-glucopyranose 
• 604767-71-7 di-n-butyl (2-O-acetyl-3,4,6-tri-O-benzyl-β-D-glucopyranosyl) phosphate 
• 55628-54-1 3,4,6-tri-O-benzyl-D-glucal 
• 3240-34-4 [bis(acetoxy)iodo]benzene 
• 142819-21-4 ethyl 2-O-acetyl-3,4,6-tri-O-benzyl-1-thio-β-D-glucopyranoside 
• 152871-96-0 phenyl 1-deoxy-2-O-acetyl-3,4,6-tri-O-benzyl-1-thio-β-D-glucopyranoside 
• 19488-48-3 methyl O-2,3,6-tri-O-benzyl-α-D-glucopyranoside 
• 138181-78-9 Chloro-dimethyl-((2R,3R,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-ylmethoxy)-silane 
• 108-24-7 acetic anhydride 
• 205987-04-8 methyl 3,4,6-tri-O-benzyl-α-D-glucopyranosyl-(1->6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside S5 
• 76679-47-5 methyl-2,3,4-tri-O-benzyl-6-O-trifluoromethanesulfonyl-α-D-glucopyranoside 

Relevant academic research and scientific papers

Fluoride Migration Catalysis Enables Simple, Stereoselective, and Iterative Glycosylation

Challenges in the assembly of glycosidic bonds in oligosaccharides and glycoconjugates pose a bottleneck in enabling the remarkable promise of advances in the glycosciences. Here, we report a strategy that applies unique features of highly electrophilic b

METHODS FOR GLYCOSYLATION

Provided herein are methods of glycosylation in the formation of disaccharides, trisaccharides, and oligosaccharides using fluoroglycosides, silyl ether glycosides and a triaryl borane catalyst.

Regio- and Stereoselective Synthesis of 1,2- cis-Glycosides by Anomeric O-Alkylation with Organoboron Catalysis

Regio- and stereoselective synthesis of 1,2-cis-glycosides has been achieved by catalytic anomeric O-alkylation using organoboron compounds. Modulating steric and electronic factors of both catalysts and substrates enables activation of the axially oriented anomeric oxygens of glucose-derived dialkoxyborates. The mild reaction conditions allow broad functional-group tolerance. This approach can be applied to the efficient sequential synthesis of oligosaccharides.

MPTGs: Thioglycoside Donors for Acid-Catalyzed O-Glycosylation and Latent-Active Synthetic Strategies

4-(p-Methoxyphenyl)-4-pentenylthioglycosides (MPTGs) undergo acid-catalyzed O-glycosylation with a range of alcohol acceptors in the presence of 10 mol % of triflic acid at room temperature. Particularly encouraging is the reactivity of MPTGs toward unrea

Interrupted Pummerer Reaction in Latent-Active Glycosylation: Glycosyl Donors with a Recyclable and Regenerative Leaving Group

Latent O-glycosides, 2-(2-propylthiol)benzyl (PTB) glycosides, were converted into the corresponding active glycosyl donors, 2-(2-propylsulfinyl)benzyl (PSB) glycosides, by a simple and efficient oxidation. Treatment of the PSB donor and various acceptors with triflic anhydride provided the desired glycosides in good to excellent yields. The leaving group, which was activated by an interrupted Pummerer reaction, can be recycled (PSB-OH) and regenerated as the precursor (PTB-OH). A natural hepatoprotective glycoside, leonoside F, was efficiently synthesized in a convergent [3+1] manner with this newly developed method. The present total synthesis also led to a structural revision of this phenylethanoid glycoside.

AuIII-halide/phenylacetylene-catalysed glycosylations using 1-o-acetylfuranoses and pyranose 1,2-orthoesters as glycosyl donors

1-O-Acetylfuranoses and pyranose 1,2-orthoesters were activated with an AuIII halide/phenylacetylene relay catalyst system, and they acted as excellent glycosyl donors. Thus, 1-O-acetyl-D-ribofuranose, 1-O-acetyl-D-lyxofuranose, and 1,2-orthoesters selectively gave the corresponding 1,2-trans glycosides, whereas 1-O-acetyl-D-arabinofuranose and 1-O-acetyl-D-xylofuranose both gave mixtures of 1,2-trans and 1,2-cis glycosides, with the 1,2-trans glycosides predominating. A new glycosylation method has been developed for 1-O-acetylfuranoses and pyranose 1,2-orthoesters, using AuIII halides and phenylacetylene as relay catalyst systems. Good anomeric selectivity was observed for 1-O-acetylfuranoses, and excellent selectivity was observed for pyranose 1,2-orthoesters. The corresponding glycosides were formed in moderate to good yields.

Application of 2-substituted benzyl groups in stereoselective glycosylation

The use of 2-O-(2-nitrobenzyl) and 2-O-(2-cyanobenzyl) groups controls stereoselective formation of 1,2-trans-glycosidic linkages via the arming participation effect. The observed stereoselectivity likely arises from the intramolecular formation of cyclic intermediate between the electron-rich substituent and the donor oxacarbenium ion providing the expected facial selectivity for attack of the glycoside acceptor. The stereodirecting effect of the 2-nitro- and 2-cyanobenzyl groups attached at the remote position (C-3, C-4, and C-6) of the donor molecule have also been investigated. To prove the postulated mechanism based on the participation effect of 2-substituted benzyl groups in the glycosylation stereoselectivity we used DFT theoretical calculation methodology.

Thioperoxide-mediated activation of thioglycoside donors

Thioperoxide (1) in combination with trimethylsilyl trifluoromethanesulfonate (TMSOTf) provides a powerful thiophilic promoter system, capable of activating different thioglycosides. Both armed and disarmed thioglycosides were activated effectively in the

Comparative solution and solid-phase glycosylations toward a disaccharide library

A comparative study on solution-phase and solid-phase oligosaccharide synthesis was performed. A 16-member library containing all regioisomers of Glc-Glc, Glc-Gal, Gal-Glc, and Gal-Gal disaccharides was synthesized both in solution and on solid phase. The

Synthesis of glycosyl phosphates from 1,2-orthoesters and application to in situ glycosylation reactions

A series of glycosyl phosphates were prepared in high yield by treatment of the corresponding 1,2-orthoesters with dibutyl phosphate. Glycosyl phosphates are efficient glycosylating agents even when used in crude form or when generated in situ. The immuno