Photolysis of 2-Amino-2'-azidobiphenyls: Formal Formation of Internally Trapped Didehydroazepines

Article abstract of DOI:10.1246/bcsj.67.895

Photolysis of 2-amino-2'-azidobiphenyls in diethylamine gave 4,10-dihydroazepino<2,3-b>indoles (7), the structure of which corresponded to the didehydroazepines formally trapped with an internal amino group.However, the yields of 7 were considered low, which was due to the significant intramolecular interaction of the photolytically generated nitrene with an amino group, to afford benzocinnoline as a final product.