The development of a direct ylide transfer to carbonyl derivatives and of a sulfoxide-mediated arylation is presented from a unified perspective. Mechanistic studies (including density functional calculations) support a common reaction pathway and showcase how subtle changes in reactant properties can lead to disparate and seemingly unrelated reaction outcomes.
Gold-Catalyzed Intermolecular Synthesis of Alkylidenecyclopropanes through Catalytic Allene Activation
作者:Juliette Sabbatani、Xueliang Huang、Luís F. Veiros、Nuno Maulide
DOI:10.1002/chem.201402935
日期:2014.8.18
A stereoselective gold(I)‐catalyzed intermolecular cyclopropanation of allenamides with stabilized sulfonium ylides is reported. This transformation enables the direct synthesis of diacceptor alkylidenecyclopropanes and proceeds under very mild conditions throughalleneactivation.
Synthesis and Photocatalytic Reactivity of Vinylsulfonium Ylides
作者:Immo Klose、Antonio Misale、Nuno Maulide
DOI:10.1021/acs.joc.6b01073
日期:2016.8.19
Although sulfur ylides are textbook reagents in organic synthesis, surprisingly little variation of substituents on sulfur is usually observed. In particular, vinylsulfonium ylides have been neglected so far. Herein, we present a study on their synthesis and reactivity, including interesting behavior under photocatalytic conditions.
A Direct Ylide Transfer to Carbonyl Derivatives and Heteroaromatic Compounds
作者:Xueliang Huang、Richard Goddard、Nuno Maulide
DOI:10.1002/anie.201002919
日期:2010.11.15
Power transfer: The title reaction proceeds under mild conditions (room temperature, short reaction times) and directly affords sulfoniumylidesfrom active methylene compounds and heteroaromatics in a single step and in high yields. A detailed comparative structural analysis of a variety of ylides is presented and the implications of structure on the reactivity of these compounds are discussed.