tris(pentafluorophenyl)-borane in dichloromethane T=20°C; Sakurai reaction; 10 h;

boron trifluoride diethyl etherate in dichloromethane T=0°C; Sakurai reaction; 2 h; Inert atmosphere;

bismuth trifluoromethanesulphonate in dichloromethane T=25°C; Sakurai reaction; 44 h;

1: (1-benzenesulfonyl-butyl)-carbamic acid benzyl ester With AlCl3, aluminium chloride in 1,2-dichloro-ethane T=0°C; 0.5 h; Inert atmosphere; 2: allyltributylstannane in 1,2-dichloro-ethane T=0°C; RefluxInert atmosphere;