1.1: n-butyllithium / diethyl ether; hexane / 1 h / -65 °C / |Inert atmosphere 1.2: 1 h / -65 °C / |Inert atmosphere 2.1: hydrogenchloride / diethyl ether; hexane; water / |Inert atmosphere View Scheme

1.1: sodium hydride / mineral oil; tetrahydrofuran / 1 h / 0 °C / |Inert atmosphere 1.2: 1.75 h / 0 - 20 °C / |Inert atmosphere 2.1: n-butyllithium / diethyl ether; hexane / 1 h / -65 °C / |Inert atmosphere 2.2: 1 h / -65 °C / |Inert atmosphere 3.1: hydrogenchloride / diethyl ether; hexane; water / |Inert atmosphere View Scheme