- Novel photo-fragmentation of 3,3,6,6-tetra(p-methoxyphenyl)-1,2-dioxane through a C-O bond cleaved 1,6-diradical intermediate
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Photolysis and thermolysis of 3,3,6,6-tetraaryl-1,2-dioxanes were investigated. The photolysis of 3,3,6,6-tetra(p-methoxyphenyl)-1,2-dioxane afforded 1,4,4-tri(p-methoxyphenyl)-3-buten-1-one and p-methoxyphenol through a novel C-O bond cleaved 1,6-diradical intermediate, while the thermolysis mainly afforded the expected decomposition product 4,4'-dimethoxybenzophenone through an O-O bond cleaved 1,6-dioxy diradical intermediate.
- Kamata, Masaki,Tanaka, Takehito,Kato, Mitsuaki
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p. 8181 - 8184
(2007/10/03)
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- FORMATION OF A 1,2-DIOXANE BY ELECTRON-TRANSFER PHOTOOXYGENATION OF 1,1-DI(p-ANISYL)ETHYLENE
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A new mode of electron-transfer photooxygenation is shown to occur with the title compound (4).With this electron-rich ethylene derivative, DCA-sensitization in acetonitrile gives rise to the quantitative formation of a cyclic peroxide (5) by cycloaddition of 2 molecules of 4 and 1 molecule of O2.A mechanism is outlined for this reaction.
- Gollnick, Klaus,Schnatterer, Albert
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p. 185 - 188
(2007/10/02)
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