Direct Method for Carbon-Carbon Bond Formation: The Functional Group Tolerant Cobalt-Catalyzed Alkylation of Aryl Halides
作者:Muriel Amatore、Corinne Gosmini
DOI:10.1002/chem.201000178
日期:2010.5.25
cobalt‐catalyzedalkylation of aryl halides has been developed that proceeds smoothly in the presence of phosphanes or bipyridines as ligands with a variety of alkylhalides, including challenging alkyl electrophiles bearing β‐hydrogen atoms (see scheme). Sensitive functional groups are tolerated on both coupling partners, thus, significantly extending the general scope of transition‐metal‐catalyzed
method devoted to the directconjugateaddition of functionalized aryl compounds onto Michael acceptors is described. The CoBr2(2,2‘-bipyridine) complex appears to be an extremely suitable catalyst for the activation of a variety of aromatic reagents ranging fromhalides to triflates functionalized by reactive groups. This procedure allows for the synthesis of compounds resulting from 1,4-addition in good