2-diarylbenzenes induce intramolecular C–C bond formation. The substrates studied were prepared by the stepwise Suzuki–Miyaura coupling reaction that introduced 2-naphthyl, 2-anthranyl, and 2-pyrenyl groups on the ortho-positions of benzene. The subsequent oxidation reaction with FeCl3 induced an oxidative C–C bond formation reaction in the interior regions of the molecules. In marked contrast to our previous
1:2–5:6-Dibenzocoronene (IV) was obtained from 1:2–4:5–8:9-tribenzopyrene (II) via the dianhydride (III). 1:2–4:5-Dibenzopyrene (V) condensed twice with maleic anhydride. The resulting dianhydride (VI) gave 1:2-benzocoronene (VII) on decarboxylation. 1:12-o-Phenyleneperylene (X) was obtained by a zinc dust melt from the quinone (VIII). The annellationeffects passing from triphenylene and perylene to the benzocoronenes
Gas-phase Diels–Alder cycloaddition of benzyne to an aromatic hydrocarbon bay region: Groundwork for the selective solvent-free growth of armchair carbon nanotubes
作者:Eric H. Fort、Lawrence T. Scott
DOI:10.1016/j.tetlet.2010.10.033
日期:2011.4
Benzyne, generated in the gas phase by pyrolysis of phthalic anhydride, has been shown to undergo Diels–Alder cycloaddition to the bay region of perylene, a typical polycyclic aromatic hydrocarbon, under solvent-free conditions in a high temperature flow system. The initial cycloadduct spontaneously loses two hydrogen atoms, thereby rearomatizing to give naphtho[1,2,3,4-ghi]perylene. Analogous Diels–Alder
作者:D. E. Pavlyuk、S. Gundala、I. S. Kovalev、D. S. Kopchuk、A. P. Krinochkin、A. V. Budeev、G. V. Zyryanov、P. Venkatapuram、V. L. Rusinov、O. N. Chupakhin
DOI:10.1134/s1070428019030278
日期:2019.3
two methods were studied. According to the first method, diazoniumsalts derived from anthranilic acids and stabilized by 4-dodecylbenzenesulfonic acid were treated with potassium fluoride in toluene in the presence of 18-crown-6 on heating. The second method involved generation of arynes directly from substituted anthranilic acids by the action of isoamyl nitrite in toluene on heating. The corresponding