Catalytic Dehydration of Fructose to 5-Hydroxymethylfurfural (HMF) in Low-Boiling Solvent Hexafluoroisopropanol (HFIP)

Conversion of fructose into 5-hydroxymethylfurfural (HMF) and its derivatives promoted by inorganic salt in alcohol.

The conversion of D-fructose to 5-hydroxymethylfurfural (HMF) on a 1 mmol scale was achieved in good yield (68%) using NH(4)Cl as catalyst in isopropanol at 120°C. About 3% of 5-i-propoxymethylfurfural was formed. The reaction in ethanol at 100°C on a 10g scale gave a total yield of HMF and 5-ethoxymethylfurfural of 42%. No mineral acid such as H(2)SO(4) and HCl are required.

Introducing Fructose Syrup 55% as an Alternative to High Hydroxymethylfurfural (HMF) Products Such as Invert Sugar

Hydroxy Methyl Furfural (HMF) is a compound that is formed as a result of heat treatment and long storage of sugar products such as invert sugar and according to codex standards its limit in foods is 40 ppm. Fructose syrup 55% is a transparent liquid with a sweet taste and has no off-flavor and has similar sweetness and functional properties to sucrose. Various studies show that due to the prod...

Dehydration of Glucose to 5‐Hydroxymethylfurfural Using Nb‐doped Tungstite

Dehydration of glucose to 5-hydroxymethylfurfural (HMF) remains a significant problem in the context of the valorization of lignocellulosic biomass. Hydrolysis of WCl6 and NbCl5 leads to precipitation of Nb-containing tungstite (WO3 ⋅H2 O) at low Nb content and mixtures of tungstite and niobic acid at higher Nb content. Tungstite is a promising catalyst for the dehydration of glucose to HMF. Co...

Mechanism of the dehydration of D-fructose to 5-hydroxymethylfurfural in dimethyl sulfoxide at 150 C: an NMR study

0008-6215/$ see front matter 2008 Elsevier Ltd. A doi:10.1016/j.carres.2008.09.008 * Corresponding author. Tel.: +1 936 261 3107; fax E-mail address: [email protected] (A. S. The anomeric composition of D-fructose in dimethyl sulfoxide changes when the solution is heated from room temperature to 150 C, with a small increase in the a-furanose form at the expense of the b-pyranose tautomer....

Synergy of boric acid and added salts in the catalytic dehydration of hexoses to 5- hydroxymethylfurfural in water