chloro-trimethyl-silane; sodium iodide in acetonitrile T=0 - 20°C;

1.1: triethylamine / dichloromethane / 7 h / 0 °C / |Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran; hexane / 1 h / -78 °C / |Inert atmosphere 2.2: -78 - 20 °C / |Inert atmosphere 3.1: sodium iodide; chloro-trimethyl-silane / acetonitrile / 0 - 20 °C View Scheme

1.1: n-butyllithium / tetrahydrofuran; hexane / 1 h / -78 °C / |Inert atmosphere 1.2: -78 - 20 °C / |Inert atmosphere 2.1: sodium iodide; chloro-trimethyl-silane / acetonitrile / 0 - 20 °C View Scheme