1: [14C]-3-Methylindole With n-butyllithium 2: With carbon dioxide 3: chloro-diphenylphosphine Further stages;

1: Lithium 3-methylindole-1-carboxylate With tert.-butyl lithium in tetrahydrofuran; pentane T=-70°C; 1 h; Inert atmosphere; 2: chloro-diphenylphosphine in tetrahydrofuran; pentane T=-70 - 20°C; 16 h; Inert atmosphere; 3: With water in tetrahydrofuran; pentane Inert atmosphere;

1: 3-Methyl-1-indolcarbonsaeure With tert.-butyl lithium in tetrahydrofuran; hexane; pentane T=-70°C; 1 h; 2: chloro-diphenylphosphine in tetrahydrofuran; hexane; pentane T=-70 - 20°C; 16 h; Further stages.;

lithium aluminium tetrahydride Inert atmosphere;