1: lithium hydroxide hydrate / tetrahydrofuran; water / 18 h 2: triphenylphosphine; di-isopropyl azodicarboxylate / 3 h / 0 °C 3: 1,1-dimethylethylmagnesium chloride / diethyl ether / 2 h / 0 °C View Scheme

1: lithium hydroxide hydrate / tetrahydrofuran; water / 18 h 2: triphenylphosphine; di-isopropyl azodicarboxylate / 3 h / 0 °C 3: 1,1-dimethylethylmagnesium chloride / diethyl ether / 2 h / 0 °C 4: hydrogen; palladium 10 on activated carbon / ethyl acetate; methanol / 18 h / 750.08 Torr View Scheme