Photochemical generation and methanol trapping of localized 1,3 and 1,4 singlet diradicals derived from a spiroepoxy-substituted cylcopentane 1,3- diyl

Article abstract of DOI:10.1021/ja9822761

The direct and benzophenone-sensitized photodenitrogenation of the azoalkane 2,3-diazabicyclo-[2.2.1]hept-2-ene-7,3'-spiro-2',2'-diphenyloxirane 1 at ambient temperature (ca. 15 °C) in benzene afforded exclusively the 6- oxabicyclo[3.2.0]hept-1-ene 3. The