Process for preparation of --pyrone derivatives

Details Process for preparation of --pyrone derivatives Process for preparation of --pyrone derivatives

C - Chemistry, Metallurgy

12

P

C12P 17/06 (2006.01) C07D 309/40 (2006.01) C12P 19/02 (2006.01)

Patent

CA 2081689

Disclosed is a novel process for the produc- tion of pyrocomenic acid [3-hydroxy-4(1H)-pyran-4-one and rubiginol [3,5-dihydroxy-4(1H)-pyran-4-one, which are starting materials for synthesis of maltols useful as food spices as well as additives for cosmetics. The chemical reactions possibly taking place in the fermentation and the heating post-treatment thereof in the present invention are shown as follows: Image Image or/and Image .alpha.-Methyl-D-xyloside IIa IIb Image Image + Image III IV - 1 - The microorganisms usable in the above oxidation fermentation include Gluconobacter rubiginosus IFO 3244, Gluconobacter suboxydans IFO 3254, Gluconobacter melanogenus IFO 3293, Pseudomonas fluorescens IFO 3081, Erwinia carotovara IFO 3380 etc.

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