DL-epi-Inosose

Pentahydroxycyclohexanone Phenylhydrazone(nryo-Inos-ose-2 Phenylhydrazone) 2D-2,3,4,6/5-Pentahydroxycyclohexanone Phenylhydrazone, and 2L-2,4,5,6/3-Pentahydroxycyclohexanone Phenylhydrazone (DL-epi-Inosose Phenylhydrazone). These were prepared by the procedure of Posternak (65), mp 181° and 189°-191°C, respectively. 

Posternak moderated the nitric acid oxidation and obtained about a 10% yield of pure DL-epi-inosose-2 (90). This is the racemate of the active form obtained by bacterial oxidation of epi-inositol, which was obtained by reduction of DL-epi-inosose-2 (Fig. 1) (5 a, 76). The oxidation of d-quer-citol to galactaric acid has already been mentioned. 

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