PHOTOLYSIS OF 2,3-DIPHENYLNAPHTHOQUINONE OXIDE: TRAPPING OF A BENZ[<i>d</i>]OXEPINE-1,5-DIONE, A SEVEN-MEMBERED MESOIONIC SYSTEM
作者:Hiroshi Kato、Kei Yamaguchi、Hiroshi Tezuka
DOI:10.1246/cl.1974.1089
日期:1974.9.5
Photolysis of 2,3-diphenylnaphthoquinone oxide resulted in carbon–carbon bond cleavage to give a seven-membered mesoionic benz[d]oxepine-1,5-dione intermediate, which was trapped by N-phenylmaleimide and norbornadiene.
Photoinduced oxygenation of an epoxynaphthoquinone
作者:Kazuhiro Maruyama、Atsuhiro Osuka、Hitomi Suzuki
DOI:10.1039/c39800000723
日期:——
Photoinducedoxygenation of epoxynaphtho-quinone (3) in benzene gave 3-acetyl-3-acetoxyphthalide (4) and 3-acetoxy-3-methylisochroman-1,4-dione (5) in good yields via the reaction of singlet oxygen with a transient carbonyl ylide.