1.1: n-butyllithium / tetrahydrofuran; hexane / 1 h / -78 °C / |Inert atmosphere 1.2: 18 h / -78 - 20 °C / |Inert atmosphere 2.1: 4-(N,N-dimethlyamino)pyridine / pyridine; dichloromethane / 0 - 20 °C / |Inert atmosphere 3.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 20 °C / |Inert atmosphere 4.1: [Au(NTf)2(Si-dtbm)] / dichloromethane / 3 h / -40 °C / |Inert atmosphere View Scheme

n-butyllithium; iodine; 1,1,1,3,3,3-hexamethyl-disilazane in tetrahydrofuran T=-78°C; 0.166667 h;