G. Papadogianakis et al., CATALYTIC CONVERSIONS IN WATER - A NOVEL CARBONYLATION REACTION CATALYZED BY PALLADIUM TRISULFONATED TRIPHENYLPHOSPHINE COMPLEXES, Journal of the Chemical Society, Chemical Communications, (23), 1994, pp. 2659-2660
The renewable basic chemical 5-hydroxymethylfurfural (HMF) is selectiv
ely carbonylated to the new compound 5-formylfuran-2-acetic acid using
a water-soluble palladium complex of trisulfonated triphenylphosphine
as the catalyst in an acidic aqueous medium at 70 degrees C and 5 bar
CO pressure; when hydrogen iodide is the acid component, the reaction
follows a different course and HMF is selectively reduced to 5-methyl
furfural.