Abstract
From an investigation of the ICD of bilatrienes-abc and 2,3-dihydrobilatrienes-abc induced by mixtures of CCl4 with (+)-cis-Pinane, (−)-lactic and (+)-tartaric acid esters it is concluded that specific interactions between chromophore and the chiral reagents afford a partial resolution of the labile racemate of helices. Attaching chiral residues covalently to the chromophore induces very low resolution of the same kind in case of apolar ligands like a cholesteryl-residue. However, with polar ligands as in the case ofBoc-lysyl derivatives enantiomeric excesses up to 90% are achieved depending on the solvent used.
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Herrn Prof. Dr.Karl Schlögl zu seinem 60. Geburtstag gewidmet.
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Edinger, J., Falk, H., Jungwirth, W. et al. Zur Chemie der Pyrrolpigmente, 56. Mitt.. Monatsh Chem 115, 1081–1099 (1984). https://doi.org/10.1007/BF00798775
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DOI: https://doi.org/10.1007/BF00798775