Preparative Organic Chemistry
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ChemInform Abstract: Lewis Acid Mediated Cyclization of ortho-Allyl Substituted Homochiral Anthraquinone Dioxolanes.
First published: August 10, 1993
Abstract
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ChemInform Abstract
The cleavage and recyclization reaction of the 2-allyl-3-dioxolanyl- substituted anthraquinone derivatives (I) under the influence of SnCl4 or TiCl4 is investigated. Both Lewis acids favor the formation of the diastereomers (III). In this reaction, two stereocenters are generated simultaneously. Other by-products are described in the original paper.
