5-Keto-L-ascorbic acid-5,5-dimethyl ketal, derivatives thereof and its use as an antioxidant and intermediate

摘要

5-Keto-L-ascorbic acid-5,5-dimethyl ketal, alkali metal and alkaline earth metal salts thereof; process for the preparation thereof; its use as an antioxidant and intermediate for production of 5-keto-L-ascorbic acid and L-ascorbic acid. 5-Keto-L-ascorbic acid and its 5,5-dimethyl ketal exhibit antiscorbutic activity.