ビタミンC合成中間体に関する研究 : (II)CALCIUM 5-KETO-D-GLUCONATEより製せるCALCIUM L-IDONATEの性質

概要

論文の詳細を見る
In the previous paper, the authors reported the production of calcium L-idonate from fresh calcium 5-keto-D-gluconate obtained by fermentation. Further experiments were performed on the properties of calcium L-idonate, thus obtained. (1) The purified crystal of dibenzal L-idonic acid can be completely hydrolyzed at 80℃ for 3 minutes or at 60℃ for 32 minutes in methanol・10% sulfuric acid (1 : 1), and the liberated benzaldehyde was estimated as 2,4-dinitrophenylhydrazone with 98-100% recovery. (2) The purity of dibenzal derivative was confirmed by means of paper chromatography. (3) The acidic nature of the derivative was investigated by potentiometric titration and by the change of specific rotation corresponding to the lactone-formation.
日本ビタミン学会の論文