Title:
PROCESS FOR PREPARING ASCORBIC ACID INTERMEDIATE
Document Type and Number:
Japanese Patent JPS545917
Kind Code:
A
Abstract:
The invention relates to a process in which a 3,5:4,6-protected derivative of L- or D-glulonic acid is prepared by contecting L- or D-gulono-1,4-lactone with an aldehyde dialkyl acetal, or with an aldehyde and an alcohol, in the presence of an acid having a pKa of less than 3. This protected derivative may be oxidised and hydrolysed to 2-keto-L- or D-gulonic acid or ester thereof, which in turn may be hydrolysed to L- or D-ascorbic acid. L-ascorbic acid is of course Vitamin C. The invention also relates to the novel intermediates produced by the above processes.
Inventors:
TOOMASU CHIYAARUZU KUROOFUOODO
Application Number:
JP7070578A
Publication Date:
January 17, 1979
Filing Date:
June 12, 1978
Export Citation:
Assignee:
PFIZER
International Classes:
C07D307/62; C07D493/04; C07H7/02; C07H7/027; C07H9/04; (IPC1-7): C07D493/04; C07H7/02
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