Cobalt-Catalyzed Ortho Alkylation of Aromatic Imines with Primary and Secondary Alkyl Halides
作者:Ke Gao、Naohiko Yoshikai
DOI:10.1021/ja403759x
日期:2013.6.26
alkylation of aromatic imines with alkyl chlorides and bromides, which allows the introduction of a variety of primary and secondaryalkyl groups at room temperature. The stereochemical outcomes of the reaction of secondaryalkylhalides suggest that the present reaction involves single-electrontransfer from a cobalt species to the alkylhalide to generate the corresponding alkyl radical. A cycloalkylated
Intermolecular Dehydrative Coupling Reaction of Aryl Ketones with Cyclic Alkenes Catalyzed by a Well-Defined Cationic Ruthenium−Hydride Complex: A Novel Ketone Olefination Method via Vinyl C−H Bond Activation
作者:Chae S. Yi、Do W. Lee
DOI:10.1021/om100051h
日期:2010.4.26
The cationic ruthenium hydride complex[(eta(6)-C(6)H(6))-(PCy(3))(CO)RuH](+)BF(4)(-) was found to be a highly effective catalyst for the intermolecular olefination reaction of aryl ketones with cycloalkenes. The preliminary mechanistic analysis revealed that an electrophilic ruthenium vinyl complex is the key species fir mediating both vinyl C-H bond activation and the dehydrative olefination steps of the coupling reaction.