112605-41-1Relevant academic research and scientific papers
Conformation Dependent Photochemistry of Dienes. Substituent Effects on the Photochemical Reactions of some 4-Acyloxy-2-azabuta-1,3-dienes
Armesto, Diego,Gallego, Mar G.,Horspool, William M.
, p. 2663 - 2666 (2007/10/02)
The photochemical behaviour of 4-acyloxy-2-azabuta-1,3-dienes is dependent upon the nature of the 3- and 4-subtituents 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) under goes 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.
