92885-62-6Relevant articles and documents
Photochemistry of 2'-substituted 1,2,3,4-Tetrahydronaphthalene-1-spiro-3'-oxaziridines. Variable-temperature 1H Nuclear Magnetic Resonance Spectroscopy of 1-Substituted 1,3,4,5-Tetrahydro-2H-1-benzazepin-2-ones
Johnson, Graham P.,Marples, Brian A.
, p. 3399 - 3406 (2007/10/02)
The lack of regioselectivity of photorearrangement of the title spiro-oxaziridines in wich the N-substituent is syn to the aromatic ring suggests that the first formed N-O-bond-cleaved species has a significant lifetime allowing rotation (inversion) to complete with rearrangement.The energy barrier to ring inversion of the title tetrahydro-1-benzazepin-2-ones is significantly influenced by the steric interaction between the N-substituent and the peri hydrogen atom.