titanium; carbon in ethylene glycol dimethyl ether 1 h; Heating;

1: With dirhodium tetraacetate in toluene T=80°C; 2: With 1,8-diazabicyclo[5.4.0]undec-7-ene in toluene T=20°C; Further stages.;

in acetic acid T=110°C; Fischer indole synthesis; 12 h;

1: 4-chloro-aniline With hydrogenchloride; sodium nitrite in water 2: α-acetylbenzenepropanoic acid ethyl ester With potassium hydroxide in ethanol; water T=0°C; 0.5 h; 3: With hydrogenchloride in ethanol 2 h; Further stages.;

ethanol; sodium hydroxide T=70°C; 3 h;