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Keywords:

  • Carbohydrates;
  • Fluorous separation;
  • Hydrazones;
  • Immobilization;
  • One-pot synthesis

Graphical Abstract

Thumbnail image of graphical abstract

A new “catch” and “release” method for oligosaccharide assembly that combines one-pot synthesis and fluorous solid-phase extraction was developed. A branched trisaccharide and a linear tetrasaccharide were synthesized rapidly in this fashion without the need for any silica gel chromatography.

Abstract

A new method for oligosaccharide assembly that combines the advantages of one-pot synthesis and fluorous separation is described. After one-pot glycosylations are completed, a fluorous tag is introduced into the reaction mixture to selectively “catch” the desired oligosaccharide, which is rapidly separated from non-fluorous impurities by fluorous solid-phase extraction (F-SPE). Subsequent “release” of the fluorous tag and F-SPE achieved the purification of the desired oligosaccharide without the use of time- and solvent-consuming silica gel chromatography. Linear and branched oligosaccharides have been synthesized with this approach in just a few hours (for the overall oligosaccharide assembly and purification process).