71732-20-2

Basic information

• Product Name: 1,2,4-tri-O-acetyl-3,5,6-tri-O-methyl-galactitol
• CAS NO: 71732-20-2
• Molecular Weight: 350.366
• Mol File: 71732-20-2.mol

Chemical Properties

• CAS DataBase Reference: 1,2,4-tri-O-acetyl-3,5,6-tri-O-methyl-galactitol(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2,4-tri-O-acetyl-3,5,6-tri-O-methyl-galactitol(71732-20-2)
• EPA Substance Registry System: 1,2,4-tri-O-acetyl-3,5,6-tri-O-methyl-galactitol(71732-20-2)

Safety Data

• Hazardous Substances Data: 71732-20-2(Hazardous Substances Data)

Upstream product

• 108-24-7 acetic anhydride 
• 74-88-4 methyl iodide 
• 67-56-1 methanol 
• 608-66-2 D-galactitol 

Relevant articles and documents

Isolation and chemical characterization of a glucogalactomannan of the medicinal mushroom Cordyceps militaris

Cordyceps militaris dried fruiting bodies were extracted with 5% KOH solution. The extract was purified by freeze-thawing treatment, and dialysis (100 kDa), giving rise to a homogeneous polysaccharide (Mw 23,000 Da). Its monosaccharide composition was mannose (56.7%), galactose (34.5%), and glucose (8.8%). The anomeric configurations were determined by their coupling constants. A complex polysaccharide was identified by NMR and methylation analysis. The HSQC spectrum showed signals at δ 107.7/5.06 and 106.1/5.14; 105.9/5.12 relative to β-D-Galf, and O-2-substituted β-D-Galf units, respectively. The sign at δ 104.4/5.21 corresponded to α-D-Galf. Other signals corresponded to α-D-Manp O-6- and O-2-substituted (δ 100.2/4.94; 100.5/5.27; 100.6/5.23; 100.7/5.16), and δ-D-Manp 2,6-di-O-substituted (from δ 99.3 to 99.9). The main linkages, confirmed by methylation analysis, showed the derivatives: 2,3,4-Me3-Manp (11.9%) and 3,4,6-Me3-Manp (28.6%). The branches were (1 → 6)-linked-α-D-Manp or (1 → 2)-linked-β-D-Galf, terminating with β-D-Galf, α-D-Galf, α-D-Galp, or α-D-Manp. 42.7% of the partially hydrolyzed product consisted of 3,4,6-Me3-Manp, suggesting a (1 → 2)-linked backbone.

A facile method for the synthesis of partially O-methylated alditol acetate standards for GC-MS analysis of galactofuranose-containing structures

Mixtures of partially O-methylated alditol acetate standards of galactofuranose were synthesized rapidly. Methyl galactofuranosides were obtained with a yield of 79.9% within 4 h under optimized reaction conditions. Methylation of methyl glycosides was carried out in the presence of BaO/Ba(OH)2·8H2O, giving rise to mixtures of partially methylated glycosides. The batch containing the most diverse structures of methyl ethers was converted into partially O-methylated alditol acetates (PMAAs) and then subjected to GC-MS. These PMAAs could be used as GC-MS standards for simultaneous identification of galactofuranose units with diverse linkages in complex carbohydrates.