Direct Cobalt-Catalyzed Cross-Coupling Between Aryl and Alkyl Halides
作者:Axel Jacobi von Wangelin、Waldemar Czaplik、Matthias Mayer
DOI:10.1055/s-0029-1218012
日期:2009.11
An operationally simple cross-coupling reaction between aryl halides and alkylhalides with high selectivity has been developed. The underlying domino process utilizes CoCl 2 /Me 4 -DACH as a catalyst system. The methodology exhibits high sustainability as it obviates the need for the pre-formation and handling of stoichiometric amounts of hazardous Grignard compounds.
Domino Iron Catalysis: Direct Aryl-Alkyl Cross-Coupling
作者:Waldemar Maximilian Czaplik、Matthias Mayer、Axel Jacobi von Wangelin
DOI:10.1002/anie.200804434
日期:2009.1.5
Striking while the iron is hot: Cheap FeCl3 serves as the precatalyst for the direct cross‐coupling of aryl and alkyl halides that is based on the sequence of Grignard formation and subsequent cross‐coupling. This one‐pot reaction obviates preformation of hazardous Grignard compounds and limits the amount of reactive organomagnesium intermediates to low quasi‐stationary concentrations. TMEDA=N,N,N′