172291-57-5

Basic information

• Product Name: methyl (benzyl 3,4-O-isopropylidene-β-D-lyxo-hexopyranosid)-2-ulo-2,6-pyranoside
• Synonyms: methyl (benzyl 3,4-O-isopropylidene-β-D-lyxo-hexopyranosid)-2-ulo-2,6-pyranoside
• CAS NO: 172291-57-5
• Molecular Weight: 322.358
• Mol File: 172291-57-5.mol

Chemical Properties

• CAS DataBase Reference: methyl (benzyl 3,4-O-isopropylidene-β-D-lyxo-hexopyranosid)-2-ulo-2,6-pyranoside(CAS DataBase Reference)
• NIST Chemistry Reference: methyl (benzyl 3,4-O-isopropylidene-β-D-lyxo-hexopyranosid)-2-ulo-2,6-pyranoside(172291-57-5)
• EPA Substance Registry System: methyl (benzyl 3,4-O-isopropylidene-β-D-lyxo-hexopyranosid)-2-ulo-2,6-pyranoside(172291-57-5)

Safety Data

• Hazardous Substances Data: 172291-57-5(Hazardous Substances Data)

Upstream product

• 85194-35-0 benzyl 3,4-O-isopropylidene-6-O-(1-methoxy-1-methylethyl)-β-D-galactopyranoside 
• 172291-54-2 benzyl 3,4-O-isopropylidene-β-D-lyxo-hexopyranosid-2-ulo-2,6-pyranose 
• 74-88-4 methyl iodide 

Relevant articles and documents

New syntheses of D-tagatose and of 1,5-anhydro-D-tagatose from D-galactose derivatives.

3,4-O-Isopropylidene-D-lyxo-hexopyranosid-2-ulose derivatives, obtained by oxidation of 3,4,6-protected D-galactopyranosides, can be alkylated in their anionic 2,6-pyranose forms to produce bis-glycosides containing the 2,5-dioxabicyclo[2.2.2]octane ring system. The 1-benzyl-2-methyl bis-glycoside 4b, when subjected to catalytic hydrogenolysis, produces the methyl D-lyxo-hexopyranos-2-uloside 10, existing as an 8:2 mixture of 1,5-pyranose anomers 9. Computational and NMR evidence is presented in favour of the hypothesis that the major anomer has the alpha configuration. Reduction of 9/10 with NaBH4 gives methyl 3,4-O-isopropylidene-beta-D-tagatopyranoside, that can be hydrolyzed to D-tagatose. A simple synthesis of 1,5-anhydro-D-tagatose, starting from 1,5-anhydro-D-galactitol, is also presented. All new compounds were fully characterized by elemental analysis and by 1H and 13C NMR spectroscopy.