1: benzenesulfonamide With sodium hydride in N,N-dimethyl-formamide T=20°C; 0.166667 h; 2: (Z)-1,4-Dichloro-2-butene in N,N-dimethyl-formamide T=20°C; 20 h;

sodium cyanoborohydride; trifluoroacetic acid

1.1: triethylamine / dichloromethane / 0 °C / |Inert atmosphere 1.2: 0 - 20 °C / |Inert atmosphere 2.1: RuCl2(tricyclohexylphosphine)2(benzylidene) / dichloromethane / 20 °C / |Inert atmosphere View Scheme

ammonium formate; palladium diacetate; triphenylphosphine

1: With 3-chloro-benzenecarboperoxoic acid in dichloromethane T=20°C; 16 h; 2: With sodium hydrogencarbonate in dichloromethane; water