Heterocyclic Compounds
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ChemInform Abstract: Reaction of α-Haloketones with ortho-Dihydroxy-2H-1-benzopyran-2- ones. Formation of α-Pyrano-1,5-benzodioxepines - A New Heterocyclic System.
First published: 04 August 2010
Abstract
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ChemInform Abstract
While the reaction of 7,8-dihydroxybenzopyranone (I) and its 4-methyl derivative (IV) with α-haloketones provides novel α-pyrano- 1,4-benzodioxepines, the 3-chlorinated benzopyranone (VIII) gives . alpha.-pyranobenzodioxane regioisomers under analogous conditions.
