Abstract
New condensed heterocyclic system with a bridgehead phosphorus atom has been synthesized by the reaction of imidazolyl anilides of 3,4-dimethoxy- and 3-dimethylaminobenzoic acids with phosphorus(III) halides. The reaction begins with the formation of cyclic halogenophosphonites which are later able to undergo intramolecular heterocyclization to form pentacyclic compounds.
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