Preparation and Stereoselectivity of [Cr(L- or D-isoleu) (L-Ieu)<SUB>2</SUB>]

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Other Title
  • [Cr(L-orn-isoleu)(L-leu)<SUB>2</SUB>]の合成と立体選択性
  • 〔Cr(L-or D-isoleu)(L-leu)2〕の合成と立体選択性
  • Cr L or D isoleu L leu 2 ノ ゴウセイ ト リッタイ
  • Preparation and Stereoselectivity of (Cr(L- or n-isoleu)(L-leu)2).

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Abstract

Synopsis. fac(+)-[Cr(L-isoleu)(L-leu)2]⋅ 3H2O and fac(-)-[Cr(D-isoleu)(L-leu)2]⋅ 3H2O were prepared by a method, in which [Cr (L-leu)2(NCS) (CH2)] (leu=leucinato) was heated with L- and D-isoleucine, respectively, in ethanol solution (75 ° C, 5 h). Also, fac(+)-[Cr (L-isoleu)(L-leu)2]V 2H2O and fac(-)-[Cr(D-isoleu)(L-leu)2]⋅ 2H2O were obtained from the filtrate independent of the standing temperatures (5-55 ° C) at 10 days. In the case of DL-isoleucine, the diastereomeric mixture of fac(-1-)-[Cr(L-isoleu)(L-leu)2]⋅ 3H2O and fac (-)-[Cr(D-isoleu)(L-leu)2]⋅ 3H2O were prepared during heating. While, fac()-[Cr(D-isoleu)(L-leu)2]⋅ 2H2O (standing temperature 5 or 25° C) and fac(±)-[Cr(L-isoleu) (L-leu)2]⋅ 2H2O (standing temperature 40 or 55 ° C) were obtained from the filtrate. By using thi s method, the optical resolution of DL-isoleucine was suggested.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1993 (11), 1238-1243, 1993-11-10

    The Chemical Society of Japan

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