Heterocyclic Compounds
Full Access
ChemInform Abstract: A Novel Heterocyclic System from Dicoumarols.
First published: September 11, 1990
Abstract
Treatment of the dicoumarol derivatives (I) with phosphorus oxychloride in pyridine (II) results in the formation of the zwitterionic heterocyclic compounds (III).
ChemInform Abstract
Treatment of the dicoumarol derivatives (I) with phosphorus oxychloride in pyridine (II) results in the formation of the zwitterionic heterocyclic compounds (III). Analogously, the hydroxycoumarin (IV) is converted to the heterocyclic system (V). (Mechanism, yields only given in g).
