Synthesis and pharmacological screening of 1-[2-tert-aminoethyl]-8-fluoro-5-[4-fluorophenyl]-2,3,4,5-tetrahydro-1H-1-benzazepines, their 1-[aminoacetyl] analogues and 1-substituted 9-fluoro-6-[4-fluorophenyl]-5,6-dihydro-4H-s-triazolo[4,3-a]-1-benzazepines