Photoreactions with C,,-Fullerene. [3 + 21 Photocycloaddition of 2,3-Diphenyl-2H-azirineUpon irradiation 2,3-Diphenyl-2H-azirine (2) is added to CGO chanistic studies revealed two reaction paths leading to 3, 1 with formation of mono and oligo adducts. 1,9-(3,4-Dihy-i.e. the classic 1,3-dipolar cycloaddition via the nitrile ylide 4 dro-2,5-diphenyl-2H-pyrrolo)fulleren-60 (3) has been iso-(direct irradiation) or a route via 2-azaallenyl radical cations lated and identified by standard spectroscopic methods. Me-5 (sensitization by photoinduced electron transfer).
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