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Journal articles
Hydroalkylation of alkynyl Ethers via a gold(I)-catalyzed 1,5-hydride shift/cyclization sequence
Abstract : A series of alkynyl ethers react with an electrophilic gold(I) catalyst to produce a range of structurally complex spiro or fused dihydrofurans and dihydropyrans via a 1,5-hydride shift/cyclization sequence. This hydroalkylation process, which is performed under practical experimental conditions, can be applied to terminal as well as ester-substituted alkynes. It allows the efficient conversion of secondary or tertiary sp3 C-H bonds into new C-C bonds by the nucleophilic addition of a vinylgold species onto an oxonium intermediate. The stereoselectivity of the cycloisomerization process toward the formation of a new five- or six-membered cycle appears to be dependent on steric factors and the alkyne substitution pattern. © 2010 American Chemical Society.
https://hal-polytechnique.archives-ouvertes.fr/hal-00951253
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Friday, February 28, 2014 - 2:28:18 PM
Last modification on : Thursday, December 9, 2021 - 2:26:02 PM
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Friday, February 28, 2014 - 2:28:18 PM
Last modification on : Thursday, December 9, 2021 - 2:26:02 PM