抄録
Crystallization of DL-O-acetylpantolactone was carried out from a liquid of equimolar mixture of D- and L-O-acetylpantolactone by cooling at -10° to -20° for 5 days. From this crystallization process, it was found that the supercooled state of DL-O-acetylpantolactone was stable. The crystals obtained were confirmed to be a racemic cong1omerate by thermal analysis and infrared absorption spectrum. On the basis of these facts, the optical resolution of the crystals by seeded crystallization was examined in the binary system and successful results were obtained. As a result of the alternate D- and L-resolutions by this method, optical isomers were cbtained in 16% yield in a single cycle and their optical purity was over 80%.
