108399-90-2

Upstream product

• 3254-15-7 3,4,6-tri-O-acetyl-1,2-O-(1-ethoxyethylidene)-α-D-galactopyranose 
• 73445-27-9 methyl 3,4,6-tri-O-benzyl-β-D-galactopyranoside 
• 108425-20-3 methyl 3,4,6-tri-O-benzyl-2-O-<6-O-(tert-butyldiphenylsilyl)-2,3-O-isopropylidene-α-D-mannopyranosyl>-α-D-mannopyranoside 
• 108399-88-8 methyl 3,4,6-tri-O-benzyl-2-O-<6-O-(tert-butyldiphenylsilyl)-2,3-O-isopropylidene-α-D-talopyranosyl>-α-D-mannopyranoside 
• 108399-87-7 (3aS,4S,6R,7aR)-4-((2S,3S,4S,5R,6R)-4,5-Bis-benzyloxy-6-benzyloxymethyl-2-methoxy-tetrahydro-pyran-3-yloxy)-6-(tert-butyl-diphenyl-silanyloxymethyl)-2,2-dimethyl-dihydro-[1,3]dioxolo[4,5-c]pyran-7-one 
• 108399-86-6 methyl 3,4,6-tri-O-benzyl-2-O-<6-O-(tert-butyldiphenylsilyl)-α-D-mannopyranosyl>-α-D-mannopyranoside 
• 107937-20-2 methyl 3,4,6-tri-O-benzyl-2-O-α-D-mannopyranosyl-α-D-mannopyranoside 
• 108399-89-9 methyl 3,4,6-tri-O-benzyl-2-O-(2,3-O-isopropylidene-α-D-talopyranosyl)-α-D-mannopyranoside 
• 3068-32-4 1-bromo-1-deoxy-2,3,4,6-tetra-O-acetyl-a-D-galactopyranoside 
• 66492-24-8 3,4,6-tri-O-benzyl-1,2-O-(1-ethoxyethylidene)-α-D-galactopyranose 
• 81120-51-6 1,2-O-((1RS)-1-ethoxyethylidene)-β-D-galactopyranose 
• 100-39-0 benzyl bromide 
• 129948-14-7 Acetic acid (2S,3R,4S,5S,6R)-4,5-diacetoxy-6-acetoxymethyl-2-((2R,3R,4S,5S,6R)-4,5-bis-benzyloxy-6-benzyloxymethyl-2-methoxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-3-yl ester 

Relevant academic research and scientific papers

Synthesis of methyl 2-O- and 3-O-alpha-D-talopyranosyl-alpha-D-mannopyranoside.

Methyl 3,4,6-tri-O-benzyl-2-O-[6-O-(tert-butyldiphenylsilyl)-alpha-D- mannopyranosyl]-alpha-D-mannopyranoside (2) was synthesized by treatment of methyl 3,4,6-tri-O-benzyl-2-O-alpha-D-mannopyranosyl-alpha-D-mannopyranoside with tert-butylchlorodiphenylsil

PREPARATION OF α AND Β ANOMERS OF VARIOUS ISOMERIC METHYL O-D-GALACTOPYRANOSYL-D-GALACTOPYRANOSIDES. STANDARDS FOR INTERPRETATION OF 13C-N.M.R. SPECTRA OF D-GALACTOPYRANANS

The four isomer of methyl O-β-D-galactopyranosyl-β-D-galactopyranoside were prepared by condensation of 2,3,4,6-tetra-O-acetyl-α-galactopyranosyl bromide with appropriate, partially O-substitued derivatives of methyl β-D-galactopyranoside.Reaction of 3,4,6-tri-O-acetyl-1,2-O-(1-ethoxyethylidene)-α-D-galactopyranose with the same acceptors, in the presence of mercuric bromide, led to the formation of α and β linkages.Thus, it was possible to assign 13C-n.m.r. resonances of α and β anomers of methyl O-D-galactopyranosyl-β-D-galactopyranosides.In terms of application of these shift values and those of related D-galactobioses to the structual analysis of D-galactopyranans by shift comparisons, some generalizations can be made.For β-D-galactopyranans, the resonances glycosyloxylated carbon atoms of methyl O-β-D-galactopyranosyl-β-D-galactopyranosides are sensitive to structure and appear to have typical values, whereas limited variation was observed with shift of C-1' signals.On the other hand, for assigning structures to D-galactopyranans containing α linkages, the C-1' shifts (at higher field) of methyl O-α-D-galactopyranosyl-β-D-galactopyranosidesc are sensitive to linkage position, whereas those of glycosyloxylated carbon atoms vary only a little.