1: carbon dioxide With [Au(1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene)hydroxide]; potassium hydroxide in tetrahydrofuran T=20°C; P=1125.11 Torr; 0.25 h; 2: 1,3-benzoxazole in tetrahydrofuran T=20°C; P=1125.11 Torr; 12 h; 3: With hydrogenchloride in tetrahydrofuran; water regioselective reaction;

in acetic acid T=90 - 100°C; 1 h;

alkaline permanganate solution

in N,N-dimethyl-formamide T=80°C; 1 h; Inert atmospheresealed tube;

1: thionyl chloride / ethanol / 4 h / 20 °C 2: triethylamine / 3 h / |Reflux View Scheme

durch Erhitzen oder Behandeln mit Salzsaeure;

thionyl chloride in ethanol T=20°C; 4 h;