1.1: n-butyllithium / tetrahydrofuran / -78 - 0 °C 2.1: iodine / benzene / 20 °C 3.1: KF*2H2O; 18-crown-6 ether / N,N-dimethyl-formamide / 20 °C 4.1: tetrakis(triphenylphosphine) palladium(0); copper(l) iodide; piperidine / benzene / 2 h / 20 °C / |Inert atmosphere; |Darkness 5.1: acetyl chloride; methanol / 0 °C 6.1: water / methanol / 5 h / 50 °C 7.1: water; lithium hydroxide hydrate / methanol / 0 °C / |Inert atmosphere 7.2: |Inert atmosphere View Scheme