Solvent-dependent selective oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid under neat conditions

Kaijian Liu,T. Zeng,J. Zeng,Shao-feng Gong,Jun He,Ying-Wu Lin,Jia-Xi Tan,Zhong Cao,Weimin He

Published 2019 in Chinese Chemical Letters

ABSTRACT

Abstract An eco-friendly and economical route for the oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) with atmospheric dioxygen as the sole oxidant under acid-, base-, metal-, and external initiator-free conditions in minimal solvent was reported. In the present reaction, the 1,2-diethoxyethylane has a dual role: reaction medium and free-radical initiator. The FDCA easily crystallizes during the reaction and was simple purified via recrystallization to provide the pure FDCA.

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