Two-Step Functionalization of Oligosaccharides Using Glycosyl Iodide and Trimethylene Oxide and Its Applications to Multivalent Glycoconjugates

Details

• Alternative Title:
  Chemistry
• Personal Author:
  Hsieh, Hsiao-Wu ; Davis, Ryan A. ; Hoch, Jessica A. ; Gervay-Hague, Jacquelyn
• Description:
  Oligosaccharide conjugates, such as glycoproteins and glycolipids, are potential chemotherapeutics and also serve as useful tools for understanding the biological roles of carbohydrates. With many modern isolation and synthetic technologies providing access to a wide variety of free sugars, there is increasing need for general methodologies for carbohydrate functionalization. Herein, we report a two-step methodology for the conjugation of per-O-acetylated oligosaccharides to functionalized linkers that can be used for various displays. Oligosaccharides obtained from both synthetic and commercial sources were converted to glycosyl iodides and activated with I2 to form reactive donors that were subsequently trapped with trimethylene oxide to form iodopropyl conjugates in a single step. The terminal iodide served as a chemical handle for further modification. Conversion into the corresponding azide followed by copper-catalyzed azide-alkyne cycloaddition afforded multivalent glycoconjugates of Gb3 for further investigation as anti-cancer therapeutics.
• Subjects:
  Carbohydrates Glycoconjugates Glycosylation Humans Iodides Molecular Structure Oligosaccharides
• Keywords:
  Carbohydrates Functionalization Glycosylation Glycosyl Iodides Multivalent Glycoconjugates
• Source:
  Chemistry. 2014; 20(21):6444-6454
• Pubmed ID:
  24715520
• Pubmed Central ID:
  PMC4497529
• Document Type:
  Journal Article
• Funding:
  R01 GM090262/GM/NIGMS NIH HHSUnited States/ ; PR1973/PR/OCPHP CDC HHSUnited States/ ; R01 M090262/PHS HHSUnited States/
• Volume:
  20
• Issue:
  21
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:8b59aeb91b6c8dca6e30a7d9008445afef6e30b6e17a2e6c85b6362fd0efd83a
• Download URL:
  https://stacks.cdc.gov/view/cdc/32043/cdc_32043_DS1.pdf
• File Type:
  [PDF - 2.00 MB ]