Oligoindenopyrenes: A New Class of Polycyclic Aromatics
作者:Hermann A. Wegner、Helge Reisch、Karsten Rauch、Attila Demeter、Klaas A. Zachariasse、Armin de Meijere、Lawrence T. Scott
DOI:10.1021/jo0613939
日期:2006.11.1
A newclass of polycyclic aromatic hydrocarbonsoligoindenopyreneshas been synthesized featuring a Pd-catalyzed Suzuki−Heck coupling cascade. The oligoindenopyrenes are robust, highly colored substructures of C70 and have properties that might prove useful in new organic materials or devices. After excitation, the tetraindenopyrene derivative 3d undergoes efficient deactivation (99%) by internal conversion
A New Suzuki−Heck-Type Coupling Cascade: Indeno[1,2,3]-Annelation of Polycyclic Aromatic Hydrocarbons
作者:Hermann A. Wegner、Lawrence T. Scott、Armin de Meijere
DOI:10.1021/jo020367h
日期:2003.2.1
Under palladium catalysis, o-bromobenzeneboronic acid can be coupled with 1-bromonaphthalene (6) and with oligocyclic bromoarenes to furnish indeno-annelated polycyclicaromatichydrocarbons 1-4 and 25 in a single operation in moderate to good yields (27-87%). Alternatively, o-dibromoarenes and 1,2-dibromocycloalkenes can be cross-coupled with 1-naphthaleneboronic acid under the same conditions to
Benzannulation via Ruthenium-Catalyzed Diol–Diene [4+2] Cycloaddition: One- and Two-Directional Syntheses of Fluoranthenes and Acenes
作者:Laina M. Geary、Te-Yu Chen、T. Patrick Montgomery、Michael J. Krische
DOI:10.1021/ja502659t
日期:2014.4.23
A new benzannulation protocol is described and applied to the synthesis of polycyclic aromatic hydrocarbons. Ruthenium(0)-catalyzed diol-diene [4+2] cycloaddition delivers cyclohex-1-ene-4,5-diols, which are subject to aromatization upon dehydration or Nicholas diol deoxydehydration. Employing diol and tetraol reactants, benzannulation can be conducted efficiently in one- and two-directional modes
Intramolecular Aryl–Aryl Coupling of Fluoroarenes through Al<sub>2</sub>O<sub>3</sub>-Mediated HF Elimination
作者:K.Yu. Amsharov、P. Merz
DOI:10.1021/jo300783y
日期:2012.6.15
A strategy for effective intramolecular aryl-aryl coupling of fluoroarenes through Al2O3-mediated HF elimination is reported. It is demonstrated that the C-F bond, which is widely believed to be the most passive functionality in organic chemistry, can be reconsidered as a useful functional group allowing very effective C-C bond formation. The solid-state strategy presented in this study opens the possibility for facile syntheses of insoluble extended polycyclic aromatic hydrocarbons.
Schaden, Gerhard, Zeitschrift fur Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 1980, vol. 35, # 10, p. 1328