Abstract The copper-catalysed decomposition of diazonium salts derived from N-mesyl- dibenzylamines has been examined. 2-Amino-N-mesyldibenzylamine (8a) gave 6-mesyl-6, 7-dihydro-5H-dibenz [c, e] azepine (9a) as the major product, together with benzaldehyde and N-benzylmethanesulphonamide (6a). Derivatives of the amine (8a) bearing 4?-methyl (8b), 4?-chloro (8c), 2?-chloro (8d), and 4?-methoxy (8e) substituents were cyclized to the ...
