From the reaction mixture of the dehydrobormination of 1-bromo-4 benzoyloxyimino-1, 2, 3, 4-tetrahydrophenanthrene (1) with 1, 8-diazabicyclo [5.4. 0] undec-7-ene (DBU) in benzene and in heavy atom solvents several products were isolated and their structures elucidated. The origin of the majority of compounds has been considered via the labile O- benzoylhydroxylamine 12, except product 11. The generation of a nitrenium ion in singlet ...
