PHOTOCHEMICAL REACTION OF EPOXYNAPHTHOQUINONES WITH ALCOHOLS. AN IONIC TRAPPING OF CARBONYL YLIDES
作者:Atsuhiro Osuka、Hitomi Suzuki、Kazuhiro Maruyam
DOI:10.1246/cl.1981.201
日期:1981.2.5
Irradiation of several 2,3-dialkyl-2,3-epoxy-2,3-dihydro-1,4-naphthoquinones in the presence of alcohol gave ring-contracted alcohol-adducts via nucleophilic addition of alcohol to carbonylylides.
The oxirane ring of epoxynaphthoquinones was reductively opened upon irradiation in the presence of triethylamine and, in addition, a cross adduct was obtained in the reaction with N,N-dimethylaniline in benzene. CIDNP signals observed in the reaction with N,N-dimethylaniline were interpreted as evidence for hydrogen atom abstraction in benzene and for electron transfer in acetone and acetonitrile