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US 4,230,880 AGranted
2,5-Diketogluconic acid esters
AssigneePfizer Inc.
InventorGlenn C. Andrews
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Abstract
The novel stereoselective and regioselective alkali metal borohydride reduction of 2,5-diketogluconic acid, alkyl esters or salts thereof to form 2-ketogluconic acid together with lesser amounts of 2-ketogluconic acid is disclosed. The 2-ketogluconic acid is readily converted to ascorbic acid.
Claims3
A normal-alkyl ester of 2,5-diketogluconic acid wherein said alkyl group is of 1 to 4 carbon atoms.
Methyl 2,5-diketogluconate.
Dependencies are inferred from the claim text.