Optical resolution of DL-amino acids by ligand exchange : I. a study of the resolution of DL-aspartic acid with the aid of copper complexes of L(a)-alanine

J.J.H. Kan, Van, J.J.P.M. Bachus

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    Abstract

    Spectrophotometric studies were made of the reaction of the Cu complexes of L-alanine with DL-aspartic acid to give a ppt. of a Cu-D-aspartic acid complex, and the effects of stirring, addn. of NaClO4 as supporting electrolyte, pH, and temp. on the quantity of the complex pptd. were detd. Both L- and D-aspartic acid react with the Cu-L-alanine complex, and the Cu-D-aspartic acid complex pptd. is nonstoichiometric with no evidence of Cu-Cu bonds. After pptn. of the Cu-D-aspartic acid complex, a Cu-L-aspartic acid complex is pptd. Resoln. occurs only between pH 2.7 and 5.3, and the specificity of resoln. is detd. by kinetics rather than by thermodynamics. [on SciFinder (R)]
    Original languageEnglish
    Pages (from-to)159-161
    JournalJournal of Applied Chemistry
    Volume20
    Issue number5
    Publication statusPublished - 1970

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