Cobalt-Catalyzed Cross-Coupling Reactions of Heterocyclic Chlorides with Arylmagnesium Halides and of Polyfunctionalized Arylcopper Reagents with Aryl Bromides, Chlorides, Fluorides and Tosylates
A range of aromatic organocopper or organomagnesium compounds undergo smooth cross-coupling reactions with aryl bromides, chlorides, fluorides and tosylates, leading to polyfunctionalized aromatics or heterocycles in the presence of cobalt salts (5-7.5 mol%) as catalysts. Very mild reaction conditions are needed and, in the case of cross-coupling with organocopper compounds, Bu4NI (1 equiv) and 4-fluorostyrene (20 mol%) are essential as promoters for successful couplings.
Iron or Cobalt-Catalyzed Carbon-Carbon Coupling Reaction of Aryls, Alkenes and Alkines With Copper Reagents
申请人:Knochel Paul
公开号:US20080269514A1
公开(公告)日:2008-10-30
The present invention relates to a process for the formation of carbon-carbon bonds starting from a copper compound of an aryl, heteroaryl, alkene or alkine and an aryl, heteroaryl, alkene or alkine compound having a suitable leaving group. The copper compounds can be prepared inter alia by means of transmetalliziation from a Grignard or lithium compound. Cross-coupling of these compounds with e.g. a halogen-substituted aryl compound is carried out by means of an iron or cobalt catalyst using suitable solvents and suitable additives.
EISEN- ODER KOBALT-KATALYSIERTE KOHLENSTOFF-KOHLENSTOFF-KUPPLUNGSREAKTION VON ARYLEN, ALKENEN UND ALKINEN MIT KUPFERREAGENZIEN
申请人:Saltigo GmbH
公开号:EP1799627B1
公开(公告)日:2010-05-05
Cobalt(II)-Catalyzed Cross-Coupling between Polyfunctional Arylcopper Reagents and Aryl Fluorides or Tosylates
作者:Tobias J. Korn、Matthias A. Schade、Stefan Wirth、Paul Knochel
DOI:10.1021/ol0529142
日期:2006.2.1
of functionalized arylmagnesium halides with CuCN.2LiCl undergo smooth cross-coupling reactions with aryl fluorides and tosylates bearing a carbonyl function in the ortho position in the presence of Co(acac)(2) (7.5 mol %), Bu(4)NI (1 equiv), and 4-fluorostyrene (20 mol %) as promoters in DME/THF/DMPU leading to polyfunctional aromatics or heterocycles.