Zur Chemie der Pyrrolpigmente, 56. Mitt. |
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Authors: | Josef Edinger Heinz Falk Walter Jungwirth Norbert Müller Ulrich Zrunek |
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Affiliation: | (1) Institut für Analytische, Organische und Physikalische Chemie, Johannes-Kepler-Universität, A-4040 Linz, Austria |
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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.Herrn Prof. Dr.Karl Schlögl zu seinem 60. Geburtstag gewidmet. |
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Keywords: | Bilatrienes-abc CD ICD Optical activity Phytochrome models |
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