2-n-Butoxy-3H-azepine (2) reacts with amines, anthranilic add and active methylene compounds to afford 2-aminoazepines 3 and 13, quinazolinoazepine 4 and 2-methylene-1, 2-dihydro-3H-azepines 6, 7, 9 and 10 respectively. The reaction of 3 with trityl tetrafluoroborate provides 3-amino-7-trityl-2-aza-1H+-norcaradienium salts 22 which on deprotonation gives 7-amino-3-trityl-3H-azepines 20. Azepines 20 on heating are ...
