1: [bis(acetoxy)iodo]benzene; palladium diacetate / 1,2-dichloro-ethane / 20 h / 110 °C / Inert atmosphere 2: n-butyllithium / tetrahydrofuran; hexane / 0.25 h / -98 °C / Inert atmosphere View Scheme

With  3-chloro-benzenecarboperoxoic acid in  dichloromethane T=0 - 20°C;  Inert atmosphere;