Abstract
Heparan sulfate (HS) and dermatan sulfate (DS) are l-iduronic acid containing glycosaminoglycans (GAGs) which are implicated in a number of biological processes and conditions including cancer and viral infection. Chemical synthesis of HS and DS is required to generate structurally defined oligosaccharides for a biological study. Herein, we present a new synthetic approach to HS and DS oligosaccharides using chemoselective glycosylation which relies on a disarmed [2.2.2] l-ido lactone motif. The strategy provides a general approach for iterative-reducing end chain extension, using only shelf-stable thioglycoside building blocks, exploiting a conformational switch to control reactivity, and thus requires no anomeric manipulation steps between glycosylations.
Published Version
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