Acid‐Catalyzed Direct Conjugate Alkenylation of α,β‐Unsaturated Ketones

Publisher： John Wiley & Sons Inc

ISSN： 0044-8249

Source： ANGEWANDTE CHEMIE, Vol.125, Iss.40, 2013-09, pp. : 10833-10837

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Abstract

Neue Kniffe, alte Reaktion: Ohne Übergangsmetalle und unter milden Bedingungen überführt die Titelreaktion eine Bandbreite von Substraten in γ,δ‐ungesättigte Ketone (siehe Schema; Tf=Trifluormethansulfonyl). Der Siliciumsubstituent in β‐Stellung am Enon ist entscheidend für die hyperkonjugative Stabilisierung des kationischen Intermediats.

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