Renewable resources, 1. Branching and crosslinking of an unsaturated oligoester with furfurylamides and sorbic acid amides via diels‐alder additions

The unsaturated polyester 1 prepared from maleic anhydride and 1,4:3,6‐dianhydro‐D‐glucitol was modified with the sorbic acid amides and furfurylamides 2, 3, 6, 7 and 8 via Diels‐Alder (DA) reactions. The cycloadditions with the monodienes 2 and 3, the bisdiene 6 and the trisdiene 7 led to branched derivatives, whereas the DA reaction with the tetradiene 8 yielded a crosslinked material. All compounds contain a high amount of molecules obtained from renewable resources.