79421-23-1Relevant academic research and scientific papers
Eine Cycloadditions-Cyclodehydrierungs-Route von stilbenoiden zu ausgedehnten aromatischen Kohlenwasserstoffen
Mueller, Markus,Mauermann-Duell, Heike,Wagner, Manfred,Enkelmann, Volker,Muellen, Klaus
, p. 1751 - 1754 (2007/10/02)
Stichworte: Cycloadditionen, Cyclodehydrierungen, Diels-Alder Reaktionen, Graphitausschnitte, Polycyclen
Photochemical Studies. On the Photofragmentation of Substituted 1,2-Dihydrophthalic Anhydrides
Fuchs, Benzion,Scharf, Gad
, p. 5395 - 5398 (2007/10/02)
The irradiation-induced transformations of 4,5-diphenyl-1,2-dihydrophthalic anhydride (2b) as well as those of the 3,6-dimethyl-4,5-diphenyl and 3,4,5,6-tetraphenyl derivatives (2c,d) are elaborated.All undergo photofragmentation, viz., CO + CO2 ejection to give aromatic hydrocarbons, while only 2b also closes electrocyclically to the bicyclohex-5-ene product 5.The quantum yields for fragmentation are indicative in this respect.The rearrangement accompanying the fragmentation of 2d to give 1,2,3,5-tetraphenylbenzene (11) was shown to occur via a triplet excited state, populated by benzene sensitization.
