L-Idosaccharic acid

II), which readily undergoes epimerization to form 2,4 3,5-dimethylene-L-idosaccharic acid (III). Attempts have been made to utilize these acids as components of nylon-like polyamides, but these have met so far with little success. 

In 1942, however, Mrs. Gerda Dangschat announced the isolation of D,L-idosaccharic acid from the oxidation of a derivative of meso-inositol. Several months later Posternak published proof that his hexaric acid from the oxidation of inosose was actually n,L-idosaccharic acid and not n,L-glucosaccharic acid. Thus, by two separate paths meso-... 

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