Sulfoxide-Mediated α-Arylation of Carbonyl Compounds
摘要:
A novel sulfoxide-mediated alpha-arylation of carbonyl compounds is reported. This reaction proceeds under very mild conditions at room temperature and does not require any transition-metal promoter or catalyst.
Gold-Catalyzed Synthesis of Furans and Furanones from Sulfur Ylides
作者:Xueliang Huang、Bo Peng、Marco Luparia、Luis F. R. Gomes、Luís F. Veiros、Nuno Maulide
DOI:10.1002/anie.201203637
日期:2012.8.27
A golden switch: Doubly stabilized sulfonium ylides can be coupled with alkynes in a gold‐catalyzed synthesis of heterocycles. This method hinges on a switch in the reactivity of the sulfur ylide resulting from the simple modification of the electron‐withdrawing moieties and leads to either furans or furanones bearing a quaternary center (see scheme).
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.
Sulfoxide-Mediated α-Arylation of Carbonyl Compounds
作者:Xueliang Huang、Nuno Maulide
DOI:10.1021/ja2031882
日期:2011.6.8
A novel sulfoxide-mediated alpha-arylation of carbonyl compounds is reported. This reaction proceeds under very mild conditions at room temperature and does not require any transition-metal promoter or catalyst.
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.