- Cobalt(II) complexes with bis-2,4-[N-(S)-phenylalanyl]-6-chlorotriazine: Synthesis, structure, and application for separation of enantiomers of butan-2-ol
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The chiral coordination compounds [Co(L)(H2O)2(MeOH)] n (1) and Co2(L)2(H2O)(MeOH)4 (2) were synthesized by the reaction of bis-2,4-[N-(S)-phenylalanyl]6-chlorotriazine (LH2) with cobalt(II) pivalate or acetate. In molecules 2, the CoII ions are linked by a bridging water molecule and two carboxy groups of the L2- anion. By passing the racemate of butan-2-ol through a chromatographic column containing complex 1 as the stationary phase, a mixture enriched with the (S)-isomer of this alcohol can be obtained.
- Satskaya, Yu. A.,Komarova,Gavrilenko,Manoylenko,Kiskin,Kolotilov,Eremenko,Novotortsev
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- Optical Resolution of Alcohols as Carbamates by HPLC on Cellulose Tris(phenylcarbamate) Derivatives
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The optical resolutions of various alcohols as phenylcarbamates were examined by HPLC on chiral stationary phases derived from sixteen cellulose tris(phenylcarbamate) derivatives.The optical resolving power of chiral stationary phases was greatly influenced by substituents on the phenyl groups of the cellulose derivatives.Also, cellulose tris(3,5-dimethylphenylcarbamate) could very efficiently resolve many racemic phenylcarbamates, including the carbamates of 2-butanol, 3-buten-2-ol, and 1-phenylethanol.Racemic phenylcarbamates having electron-donating substituents on the phenyl group were better resolved than those having electron-withdrawing substituents.The benzoates of most alcohols were not resolved as efficiently as the carbamates.
- Okamoto, Yoshio,Cao, Zun-Kui,Aburatani, Ryo,Hatada, Koichi
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p. 3999 - 4004
(2007/10/02)
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