1.1: silver trifluoromethanesulfonate / dichloromethane / 20 h / 20 °C / |Inert atmosphere 1.2: 0.75 h / 75 °C / |Inert atmosphere 2.1: 1,2-bis-(diphenylphosphino)ethane; N-ethyl-N,N-diisopropylamine; caesium carbonate; bis(η3-allyl-μ-chloropalladium(II)) / tetrahydrofuran / 20 h / 20 °C / |Inert atmosphere 3.1: potassium tert-butylate / tetrahydrofuran / 0.08 h / 20 °C / |Inert atmosphere 3.2: 2 h / -78 - 20 °C / |Inert atmosphere 4.1: trifluoroacetic acid; trifluoroacetic anhydride / dichloromethane / 17 h / 20 °C / |Inert atmosphere 5.1: hydrogen; palladium 10 on activated carbon / ethyl acetate / 18 h View Scheme