1: With tert.-butyl lithium in tetrahydrofuran; pentane T=-78°C; 0.5 h; 2: With diphenyl diselenide in tetrahydrofuran; pentane T=-78 - 20°C;

1: dichloromethane / 4 h / 20 °C / |Inert atmosphere; |Schlenk technique 2: iron (III) acetylacetonate / tetrahydrofuran; 1-methyl-pyrrolidin-2-one / 1 h / 25 °C / |Inert atmosphere; |Schlenk technique View Scheme

1: dichloromethane / 4 h / 20 °C / |Inert atmosphere; |Schlenk technique 2: iron (III) acetylacetonate / tetrahydrofuran; 1-methyl-pyrrolidin-2-one / 1 h / 25 °C / |Inert atmosphere; |Schlenk technique View Scheme