in benzene Heating;

trifluoroacetic acid 0.0333333 h; Ambient temperature;

1: [14C]-3-Methylindole With n-butyllithium in tetrahydrofuran; hexane T=-70°C; 0.333333 h; 2: carbon dioxide in tetrahydrofuran; hexane T=-70 - 20°C; 0.5 h; Further stages.;

diethyl ether

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.;