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Lewis Acid-Catalyzed Nucleophilic Substitutions of Propargylic and Allylic Silyl Ethers with Enol Silyl Ethers

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journal contribution
posted on 14.12.2002, 00:00 by Teruhiko Ishikawa, Toshiaki Aikawa, Yumiko Mori, Seiki Saito
Nucleophilic reactions of various enol silyl ethers with carbocation species generated from propargyl silyl ethers by the action of a Lewis acid have been developed. The present method is highly useful for the introduction of allenic or enyne functionalities into the α-position of substituted ketones.