Preyssler heteropolyacids in the self-etherification of 5-hydroxymethylfurfural to 5,5'(oxy-bis (methylene))bis-2-furfural (OBMF) under mild reaction conditions

PAEZ, ALEXANDER; ROJAS, HUGO A.; PORTILLA, OMAR; SATHICQ, GABRIEL; AFONSO, CARLOS A M; ROMANELLI, GUSTAVO P; MARTÍNEZ, JOSÉ J.

CHEMCATCHEM

WILEY-V C H VERLAG GMBH

Año: 2017

1867-3880

The synthesis of 5,5?(oxy-bis(methylene))bis-2-furfural(OBMF) from 5-hydroxymethylfurfural (5-HMF) was studied usingbulk and alumina-supported Preyssler heteropolyacids. Theformation of OBMF was related to the amount of Brönsted acid sites,the lowest yield to OBMF being obtained with supportedheteropolyacids. However, the Lewis acidity of HPA supported onAl2O3 favored the formation of 2,5-dimethylfurane. The effects ofsolvent, catalyst loading, temperature and reaction time on theselectivity to OBMF from 5-HMF were studied in order to optimizeOBMF production using bulk Preyssler heteropolyacids; a yield of84 % to OBMF was obtained at 5 h and 343 K. These resultsdemonstrate that bulk Preyssler heteropolyacid is a good candidatefor OBMF synthesis under mild reaction conditions