Linear Synthesis of De novo Oligo-Iduronic Acid

Abstract

L‐Iduronic acid (IdoA) plays a pivotal role in glycosaminoglycan (GAG) protein interactions. However, the structural microheterogeneity of GAG appears to impede the systematic investigation of IdoA functions. Under such conditions, oligo‐Iduronic acid (Oligo‐IdoA) are ideal and straightforward heparin mimetics to unravel the relationship between IdoA structure and functions. Herein, we report for the first‐time linear synthesis of rare oligo‐IdoA precursor utilizing anhydrous β‐L‐idopyranosyl and IdoA thiophenol building block. After screening various synthetic strategies, we have Installed successive IdoA by 5 step reactions with 25–26 % overall yield. These oligo‐IdoA are expected to be excellent probes to understand conformational plasticity of IdoA and fine tune carbohydrate–protein interactions.