in tetrahydrofuran T=0°C; 1 h;

1: oxalyl dichloride / N,N-dimethyl-formamide / dichloromethane / 2 h / 20 °C 2: potassium carbonate / dichloromethane; water / 2 h / 20 °C 3: tetrahydrofuran / 1 h / 0 °C View Scheme

in tetrahydrofuran T=0°C; 1 h; Product distribution / selectivity;

1: potassium carbonate / dichloromethane; water / 2 h / 20 °C 2: tetrahydrofuran / 1 h / 0 °C View Scheme

N,N,N',N,-tetramethylethylenediamine; tris-(dibenzylideneacetone)dipalladium(0); 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene in N,N-dimethyl-formamide T=160°C; 0.0666667 h; Sealed tubeMicrowave irradiation;