Synthesis of Functional Sugar‐Based Polyurethanes

Three new polyurethanes (PUs) with multiple pendant allyl groups were synthesized from L ‐arabinitol as versatile materials for the preparation of tailor‐made PUs with varying degrees of functionalization. Their allyl functional groups can take part in thiol‐ene reactions to obtain greatly diverse materials. Thus, six new highly functional PUs were prepared by click chemistry to give polymers with NHBoc [NH‐CO‐OC(CH₃)₃], amino, carboxylic, and 1,2‐dihydroxyethyl side groups. The thermal stability of the novel PUs was investigated by thermogravimetric analysis and differential scanning calorimetry. This strategy provides a simple and versatile platform for the design of new materials whose functionality can be easily modified to anchor diverse biologically active molecules.