作者:Benjamin T. King、Jiří Kroulík、Charles R. Robertson、Pawel Rempala、Cameron L. Hilton、Justin D. Korinek、Lisa M. Gortari
DOI:10.1021/jo061515x
日期:2007.3.1
well-established directing group effects in electrophilic aromatic substitution predict the outcome of Scholl reactions of substituted substrates. Activating o,p-directing groups (e.g., MeO) direct bond formation o,p, either intramolecularly or intermolecularly. Deactivating o,p-directing groups (e.g., Br) also direct bond formation o,p but yields are lower. Deactivating m-directors (e.g., NO2) suppress
fused aromatic systems have not generally been accessible from simple aryl halides viaannulationcascades. Here we report a single-step synthesis of fused aromatics with a triphenylene core by the palladium-catalyzedannulative dimerization of structurally and functionally diverse chlorophenylenes through double carbon-hydrogen bond activation. The partially fused polyaromatics can be transformed into