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Twisted 9, 10-phenanthrenequinones: Chromatographic enrichment of enantiomers and barriers to racemization

Mannschreck, Albrecht ; Hartmann, Erwin ; Buchner, Hans ; Andert, Doris


The enantiomers (M) and (P) of helical 9, 10-phenanthrenequinones were enriched by liquid chromatography with enantiomeric purities of 0.31 to 0.95. Their barriers to racemization (Table 2) were compared with the ones of the corresponding hydrocarbons.

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