High-Efficiency Preparation of 2,5-Diformylfuran with a Keto-ABNO Catalyst Under Mild Conditions

摘要

In this paper,we report a new catalytic system for realizing the rapid and efficient oxidation of 5-hydroxymethylfurfural (HMF).First,we used 9-azabicyclo [3.3.1]nonan-3-one-N-oxyl (keto-ABNO) as a catalyst for the aerobic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) in acetic acid.Then,we systematically studied the important reaction parameters,including the solvent,co-catalyst,and temperature.The results demonstrate that the acidic solvent used is crucial for the efficient oxidation of HMF to DFF.Under optimal conditions,we achieved a 93.4％ yield of DFF within half an hour at room temperature.We also proposed the possible mechanism for this system.