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- W1991925352 abstract "The photochemical behaviour of 4-acyloxy-2-azabuta-1,3-dienes is dependent upon the nature of the 3- and 4-substituents of the diene and also, in some cases, on the type of the 4-acyloxy group. Thus when the 3-position is unsubstituted and the 4-substituent is a phenyl the dienes undergo trans-cis-isomerization on direct irradiation independent of the type of 4-acyloxy group. When the 3-substituent is a methyl and when there is a 4-methyl or 4-phenyl group then the benzoates undergo 1,3-benzoyl migration on direct or diene quenched irradiation. The acetates (7) and (9) in this series are unreactive on direct irradiation but compound (7) undergoes trans-cis-isomerization on sensitized irradiation. The difference in behaviour of the dienes is associated with the twist around the C(3)–N bond of the diene skeleton." @default.
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- W1991925352 date "1987-01-01" @default.
- W1991925352 modified "2023-10-18" @default.
- W1991925352 title "Conformation dependent photochemistry of dienes. Substituent effects on the photochemical reactions of some 4-acyloxy-2-azabuta-1,3-dienes" @default.
- W1991925352 doi "https://doi.org/10.1039/p19870002663" @default.
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