
%0 Journal Article
%A Becker, H 
%A Skelton, BW 
%A White, AH 
%T Photochemical isomerization of 7-aryl-substituted 1H-Azepin-2(3H)-ones. Formation and X-ray structure determination of atropisomeric ketimines
%J Australian Journal of Chemistry
%D 1983/10/01
%V 36
%N 10
%P 2073-2082
%K 
%R https://doi.org/10.1071/CH9832073
%U https://www.publish.csiro.au/paper/CH9832073 
%X The structures of two isomeric 3,5-di-t-butyl-2-[(3,5-di-t-butyl-2-hydroxyphenyl){(Z)-methylimino}- methyl]cyclopent-2-en-1-ones, formed upon photoexcitation of 3,5-di-t-butyl-7-(3,5-di-t-butyl-2- hydroxyphenyl)-1-methyl-1H-azepin-2(3H)-one in methanol, have been established by X-ray diffraction, and are found to be examples of atropisomeric ketimines. In both isomers, the geometry of imino substitution is characterized by intramolecular hydrogen bonding with the phenolic hydroxyl. 
