RSC Advances

Concurrent formation of furan-2, 5-and furan-2, 4-dicarboxylic acid: unexpected aspects of the Henkel reaction

S Thiyagarajan, A Pukin, J van Haveren, M Lutz…

Index: Thiyagarajan, Shanmugam; Pukin, Aliaksei; Van Haveren, Jacco; Lutz, Martin; Van Es, Daan S. RSC Advances, 2013 , vol. 3, # 36 p. 15678 - 15686

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Citation Number: 6

Abstract

The concurrent formation of furan-2, 5-and furan-2, 4-dicarboxylic acid under solvent free conditions via a disproportionation reaction is described. By reacting potassium-2-furoate at 260° C in the presence of 22 mol% of (Lewis acidic) catalysts like CdI2 or ZnCl2, potassium- 2-furoate is disproportionated to furan and furandicarboxylic acids. Besides furan and furan- 2, 5-dicarboxylic acid (2, 5-FDCA) as the main products, furan-2, 4-dicarboxylic acid (2, 4- ...