1.1: sodium iodide / tetrahydrofuran / 16 h / 25 - 30 °C 2.1: 1,1,1,3,3,3-hexamethyl-disilazane; n-butyllithium / tetrahydrofuran; hexane / 1 h / |Cooling with ice; |Inert atmosphere 2.2: 16 h / -30 - -5 °C 3.1: sodium tetrahydroborate / tetrahydrofuran; water / 20 °C 4.1: thionyl chloride / toluene; N,N-dimethyl acetamide / 1.5 h / 89 - 95 °C View Scheme

1.1: sodium iodide / tetrahydrofuran / 16 h / 25 - 30 °C 2.1: 1,1,1,3,3,3-hexamethyl-disilazane; n-butyllithium / tetrahydrofuran; hexane / 1 h / |Cooling with ice; |Inert atmosphere 2.2: 16 h / -30 - -5 °C 3.1: sodium tetrahydroborate / tetrahydrofuran; water / 20 °C View Scheme

1.1: sodium iodide / tetrahydrofuran / 16 h / 25 - 30 °C 2.1: 1,1,1,3,3,3-hexamethyl-disilazane; n-butyllithium / tetrahydrofuran; hexane / 1 h / |Cooling with ice; |Inert atmosphere 2.2: 16 h / -30 - -5 °C 3.1: dihydrogen peroxide; lithium hydroxide hydrate / tetrahydrofuran; water / 0 - 25 °C View Scheme