Kopplung von Arylchloriden mit Lithium‐Nukleophilen, an molekular definierten Alkynyllithium‐Palladium‐Katalysatoren
Jonas F. Goebel,
Johanna Stemmer,
Nele Krüger
et al.
Abstract:Palladium‐catalyzed cross‐couplings of aryl chlorides usually call for bulky, electron‐rich ligands such as phosphines or heterocyclic carbenes. We have now found that similarly powerful cross‐coupling catalysts are obtained by the reaction of palladium salts with alkynyllithium reagents. The species initially formed in this process was characterized as a dilithium tetraalkinyl palladate complex. It catalyzes the coupling of aryl chlorides with the lithium salts of various terminal alkynes to give alkynyl aren… Show more
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