Heterocyclic Compounds
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ChemInform Abstract: Intramolecular (2 + 2) Cycloadditions of Ketenes to Carbonyl Groups. A Novel Synthesis of Substituted Benzofurans.
First published: January 12, 1988
ChemInform Abstract
The acylaryloxyacetic acids (III), prepared from the hydroxybenzenes (I) and the α-bromoacetic acids (II), are converted to the benzofurans (IV) by intramolecular cycloaddition of the intermediate ketenes.
