Acylation of cellulose in reversible ionic liquids

1,8-Diazabicyclo[5.4.0]undec-7-ene, in conjunction with methanol after CO₂ capture in DMSO created a new solvent capable of dissolving up to 8 wt% of cellulose, which could be applied as a highly efficient reaction media for the synthesis of cellulose esters under mild conditions.