503312-94-5

Upstream product

• 4551-15-9 phenylthiotrimethylsilane 
• 400091-39-6 4-methoxyphenyl (4-O-acetyl-3,6-di-O-allyl-2-O-pivaloyl-β-D-galactopyranosyl)-(1-> 4)-(3,6-di-O-allyl-2-O-pivaloyl-β-D-galactopyranosyl)-(1-> 4)-3,6-di-O-allyl-2-O-pivaloyl-β-D-galactopyranoside 

Downstream Products

• 503312-95-6 phenyl (3,6-di-O-allyl-2-O-pivaloyl-β-D-galactopyranosyl)-(1->4)-(3,6-di-O-allyl-2-O-pivaloyl-β-D-galactopyranosyl)-(1->4)-3,6-di-O-allyl-2-O-pivaloyl-1-thio-β-D-galactopyranoside 

Relevant academic research and scientific papers

Synthesis of linear β-(1→4)-galacto-hexa- and heptasaccharides and studies directed towards cyclogalactans

Synthesis of an exclusively β-(1→4)-linked galactohexa- and heptasaccharide is described by coupling a 2-O-pivaloyl-3,6-O-allyl-protected thiogalactobioside donor with an equally protected, yet terminally 4-OH-free galactopentaoside. The same approach though failed to elaborate cyclic oligomers, as neither cyclodimerization of the correspondingly protected thiogalactotriosides with a 4″-OH could be effected, nor intramolecular glycosidation of the respective hexa- and heptagalactosides with an unprotected 4-OH at one, and phenylthio or sulfoxido groups at the reducing end. The causative factors underlying this are attributed to an inadequate predisposition of the linear β-(1→4)-galactan chains to adopt the tightly coiled molecular geometry necessary for cyclization - at least at the hexa- and heptasaccharide stage.