triethylamine in dichloromethane T=0°C; Reflux;

4-(N,N-dimethlyamino)pyridine; pivaloyl chloride in dichloromethane T=100°C; Microwave irradiation;

1.1: sulfuric acid; potassium bromide; sodium nitrite / water 2.1: Inert atmosphere 3.1: tetrahydrofuran; N,N'-dimethyl-N,N'-propyleneurea; indium(III) chloride; indium; chloro-trimethyl-silane; triethylamine / 10 - 30 °C / Inert atmosphere; Sonication 3.2: Saturated solution View Scheme

1.1: Inert atmosphere 2.1: tetrahydrofuran; N,N'-dimethyl-N,N'-propyleneurea; indium(III) chloride; indium; chloro-trimethyl-silane; triethylamine / 10 - 30 °C / Inert atmosphere; Sonication 2.2: Saturated solution View Scheme