Racemic structures and optical resolution by preferential crystallization of organic ammonium salts of (.+-.)-mandelic acid.

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概要

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• According to a thermodynamic analysis the 4-methylpiperidinium salt of (±)-mandelic acid is a conglomerate around room temperature, though the salt forms a racemic compound in the vicinity of the melting point. A successive preferential crystallization in ethanol at 10°C yields both the (+)- and (−)-salts with optical purities of over 95%.

• 公益社団法人 日本化学会の論文

著者

• KUROKAWA Hidemoto

  Faculty of Engineering and High Technology Research Center, Kansai University

• NAKAMURA Mitsuhiro

  Faculty of Science and Engineering, Shimane University

• Shiraiwa Tadashi

  Faculty Of Chemistry Materials And Bioengineering Kansai University

• Nobeoka Masanobu

  Faculty of Engineering, Kansai University

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