Metal Nitrate Catalysis for Selective Oxidation of 5-Hydroxymethylfurfural into 2,5-Diformylfuran under Oxygen Atmosphere
Open Access
- 18 April 2019
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Omega
- Vol. 4 (4), 7054-7060
- https://doi.org/10.1021/acsomega.9b00391
Abstract
Selective synthesis of various versatile compounds from biomass is of great importance to displace traditional fossil fuel resources. Here, homogeneous metal nitrate (M(NO3)x)/(2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) and M(NO3)x/TEMPO/NaNO2 catalyst systems in glacial acetic acid and acetonitrile, respectively, have been found to be highly active and practically sustainable for selective oxidation of 5-hydroxymethylfurfural (HMF) into 2,5-diformylfuran (DFF) using pure O2 or even O2 in air as the oxidant. The catalytic methods enable full HMF conversion with a nearly 100% DFF selectivity at 50 °C under atmospheric pressure using a very simple reaction setup and workup. Mechanistic aspects are discussed. The influences of reaction conditions such as different metal catalysts, catalyst loading, solvents, and reaction temperature on the promotion effect were studied. Meanwhile, the catalyst systems had also good performance for aerobic oxidation of other alcohols.Keywords
Funding Information
- Natural Science Foundation of Jiangsu Province (BK20140969)
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Jiangsu Key Laboratory of Biomass Energy and Materials, Chinese Academy of Forestry (JSBEM201915)
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