method for the preparation of a mixture of 2 - ketogulonzuur and 2 - ketogluconzuur or salts thereof.

摘要

By subjecting 2,5-diketogluconic acid, its alkyl esters and its salts to a reduction using an alkali metal borohydride, 2-ketogulonic acid is formed at the same time as smaller amounts of 2-ketogluconic acid. 2-Ketogulonic acid is easily converted to ascorbic acid or vitamin C by treatment with a strong acid.