1.1: toluene-4-sulfonic acid / toluene / 140 °C / |Dean-Stark 2.1: potassium carbonate; norborn-2-ene; palladium diacetate; triphenylphosphine / ethylene glycol dimethyl ether / 16 h / 80 °C / |Inert atmosphere 3.1: hydrogenchloride / water; tetrahydrofuran / 2 h / 0 - 20 °C 4.1: titanium tetraethoxide / tetrahydrofuran / 0.17 h / 0 °C / |Inert atmosphere 4.2: 24 h / 60 °C / |Inert atmosphere 5.1: tetrabutyl ammonium fluoride / tetrahydrofuran / -78 °C / |Inert atmosphere; |Heating 6.1: hydrogenchloride; water / methanol / 4 h / 0 - 20 °C / |Inert atmosphere 7.1: palladium 10 on activated carbon; hydrogen / ethyl acetate; acetic acid / 24 h / 45 °C / 2068.65 Torr 8.1: lithium aluminium tetrahydride / tetrahydrofuran / 1 h / 0 - 20 °C / |Inert atmosphere 9.1: triethylamine / dichloromethane / 1 h / 20 °C 10.1: potassium phtalimide / N,N-dimethyl-formamide / 1 h / 100 °C 10.2: 3 h / |Reflux 11.1: triethylamine / dichloromethane / 20 °C View Scheme