1: N,N-dimethyl-formamide With trichlorophosphate T=1 - 5°C; 1.33333 h; 2: 7-phenylmethoxyindole in N,N-dimethyl-formamide T=3 - 35°C; Vilsmeir reaction;

tertiary butyl peroxybenzenoate; 2,2,2-trimethylacetic acid in dimethyl sulfoxide T=80°C; 8 h; Inert atmosphere;

1: ammonium acetate; Ac2O; AcONa / AcOH / 2 h / Heating 2: LiAlH4 / tetrahydrofuran; diethyl ether / 5.5 h / Heating 3: 47 percent / methanol / 28 h / 20 °C 4: 48 percent / Et3N / tetrahydrofuran / 16 h / 20 °C 5: 77 percent / H2 / Rh/C / ethanol / 36 h / 50 - 55 °C / atmospheric pressure 6: 67 percent / K2CO3; KI / methanol; acetone / 3 h / Heating 7: 73 percent / aq. NaOH / ethanol / 18 h / Heating View Scheme