Efficient Epimerization of Aldoses Using Layered Niobium Molybdates

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

Research output: Contribution to journalArticle

12 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

Fingerprint

Niobium
niobium
Arabinose
Xylose
Mannose
Oxides
Glucose
oxide
Molybdenum oxide
Cellobiose
glucose
Sugars
Hydrolysis
Substitution reactions
molybdenum
Catalysts
Water
hydrolysis
sugar
substitution

All Science Journal Classification (ASJC) codes

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

Cite this

Efficient Epimerization of Aldoses Using Layered Niobium Molybdates. / Takagaki, Atsushi; Furusato, Shogo; Kikuchi, Ryuji; Oyama, S. Ted.

In: ChemSusChem, Vol. 8, No. 22, 23.11.2015, p. 3769-3772.

Research output: Contribution to journalArticle

Takagaki, Atsushi ; Furusato, Shogo ; Kikuchi, Ryuji ; Oyama, S. Ted. / Efficient Epimerization of Aldoses Using Layered Niobium Molybdates. In: ChemSusChem. 2015 ; Vol. 8, No. 22. pp. 3769-3772.
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