Efficient Epimerization of Aldoses Using Layered Niobium Molybdates

Atsushi Takagaki, Shogo Furusato, Ryuji Kikuchi, S. Ted Oyama

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Both non-acidic LiNbMoO6 and strongly acidic HNbMoO6 efficiently catalyze the epimerization of sugars including glucose, mannose, xylose, and arabinose in water. The reactions over these oxides reached almost equilibrium within a few hours where yields of corresponding epimers from glucose, xylose, and arabinose were 24-29 %. The layered mixed oxides functioned as heterogeneous catalysts and could be reused without loss of activity, whereas bulk molybdenum oxide MoO3 was completely dissolved during the reaction. A 13C substitution experiment showed that the reaction proceeds through a 1,2-rearrangement mechanism. The surface Mo octahedra were responsible for the activity. The layered HNbMoO6 could also afford mannose from cellobiose through hydrolysis and successive epimerization.

Original languageEnglish
Pages (from-to)3769-3772
Number of pages4
JournalChemSusChem
Volume8
Issue number22
DOIs
Publication statusPublished - Nov 23 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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