Preparative Organic Chemistry
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ChemInform Abstract: Acid-Catalyzed Ionic Diels-Alder Reactions in Concentrated Solutions of Lithium Perchlorate in Diethyl Ether.
First published: April 16, 1996
Abstract
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ChemInform Abstract
Ketals derived from α,β-unsaturated ketones undergo ionic Diels-Alder reaction with simple dienes in concentrated etheral LiClO4- solutions. Surprisingly, the ketal (XI) undergoes a facile cycloaddition under the same conditions, whereas its parent ketone does not give any cycloadduct in the etheral LiClO4-solution.
