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
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.