Gold-Catalyzed 5- and 6-exo-dig Selective Cyclizations of Alkynyl Silyl Enol Ethers: Efficient Method for [3+2] and [4+2] Annulations onto α,β-Enones
作者:Kooyeon Lee、Phil Ho Lee
DOI:10.1002/adsc.200700304
日期:2007.9.3
An efficient method for the annulation of five- and six-membered rings onto α,β-enones is described via gold-catalyzed 5- and 6-exo-dig selective cyclizations of alkynyl silyl enolethers.
Catalytic Intramolecular Ketone Alkylation with Olefins by Dual Activation
作者:Hee Nam Lim、Guangbin Dong
DOI:10.1002/anie.201507741
日期:2015.12.7
Two complementary methods for catalytic intramolecularketonealkylation reactions with unactivated olefins, resulting in Conia‐ene‐type reactions, are reported. The transformations are enabled by dual activation of both the ketone and the olefin and are atom‐economical as stoichiometric oxidants or reductants are not required. Assisted by Kool’s aniline catalyst, the reaction conditions can be both