1: tert-butyldimethylsilyl chloride With hydroxylamine hydrochloride in N,N-dimethyl-formamide 0.5 h; Cooling with ice; 2: With triethylamine in N,N-dimethyl-formamide T=10°C; 3: p-toluenesulfonyl chloride in N,N-dimethyl-formamide T=10°C;

in N,N-dimethyl-formamide T=0 - 20°C; Inert atmosphere;

1: triphenylphosphine; diethylazodicarboxylate / tetrahydrofuran; toluene / 0 °C 2: trifluorormethanesulfonic acid / dichloromethane; water; acetonitrile / 1 h / 0 °C 3: [Au(1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene)(NTf2)] / toluene / 1 h / 60 °C / Molecular sieve View Scheme