title: Lewis acid-catalyzed nucleophilic substitutions of propargylic and allylic silyl ethers with enol silyl ethers.
abstract: 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 alpha-position of substituted ketones. [reaction--see text]
authors.affiliation: Department of Bioscience and Biotechnology, School of Engineering, Okayama University, Tsushima, Okayama, Japan 700-8530.
authors.forename: Teruhiko
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Aikawa
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Mori
authors.forename: Seiki
authors.initials: S
authors.lastname: Saito