A new class of aromaticmetamorphosis has been developed in which dibenzofurans were converted into triphenylenes. This transformation is composed of three successive operations: (1) nickel-catalyzed ring-opening C–O bond arylation with arylmagnesium bromides, (2) trifluoromethanesulfonylation (triflation) of the resulting hydroxy moiety with Tf2O, and (3) palladium-catalyzed or photoinduced ring closure
Synthese h�herkondensierter Ringsysteme durch intermolekulare Dehydrierung verschiedener Molek�le unter Verkn�pfung und Ringschlu�
作者:A. Zinke、R. Ott、O. Schuster
DOI:10.1007/bf00913855
日期:——
Asymmetric annellation effects—VI
作者:E. Clar、A. McCallum、R.A. Robertson
DOI:10.1016/s0040-4020(01)99303-2
日期:1962.1
Strong asymmetricannellationeffects are recorded in the series of lin. benzologues of triphenylene, the third branch of which does not participate in aromatic conjugation as in phenes and acenes. A new synthesis of 6.7-benzopentaphene is reported. Chrysene and 1.2,3.4-dibenzopyrene are observed as by-products.