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.
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.
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.
Facile carbon–sulfur bond cleavage in diarylsulfonium ylides: a catalytic sulfur-to-silicon group transfer
作者:Xueliang Huang、Richard Goddard、Nuno Maulide
DOI:10.1039/c2cc35762c
日期:——
An unusual cleavage of the non-ylidic carbon-sulfurbond of a sulfonium ylide is reported. The reaction can be catalysed by a variety of palladium(II) complexes under mild conditions. Preliminary results show that coordination of the ylide to the metal center results in significant structural changes.