Abstract:Eine Reaktion von Phenanthrenchinon (I) mit dem Thiodiglykolat (II) in methanolischem KOH liefert die Dihydroxyperhydrothiophendicarbonsäure (III), die bei 130°C oder unter der Einwirkung′ von Acetanhydxid in Pyridin glatt in die Thiophendicarbonsäure (IV) übergeht.
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