aluminum oxide T=130°C; P=25 Torr; 2 h;

1: 69 percent / Na2S*9H2O / Triethylhexadecylammonium-bromid / toluene; H2O / 24 h / Ambient temperature 2: 81 percent / 60percent H2O2, HOAc / 4 h / 0 °C 3: 40 percent / CH2Cl2 / 7 h / Ambient temperature 4: 77 percent / NEt3 / CH2Cl2 / 10 h / Ambient temperature View Scheme

triethylamine in dichloromethane 10 h; Ambient temperature;

1: 75 percent / N-Bromsuccinimid / CCl4 / 2 h / Heating; Irradiation 2: 69 percent / Na2S*9H2O / Triethylhexadecylammonium-bromid / toluene; H2O / 24 h / Ambient temperature 3: 81 percent / 60percent H2O2, HOAc / 4 h / 0 °C 4: 40 percent / CH2Cl2 / 7 h / Ambient temperature 5: 77 percent / NEt3 / CH2Cl2 / 10 h / Ambient temperature View Scheme

1: 81 percent / 60percent H2O2, HOAc / 4 h / 0 °C 2: 40 percent / CH2Cl2 / 7 h / Ambient temperature 3: 77 percent / NEt3 / CH2Cl2 / 10 h / Ambient temperature View Scheme

[(Nb6Cl12)Cl2(H2O)4]*4H2O supported on silica gel in tetrahydrofuran T=350°C; Inert atmosphere;

1: sodium sulfide nonahydride / ethanol / 0.67 h / |Reflux 2: sodium periodate / ethanol; water / 3 h / 0 °C 3: aluminum oxide / neat (no solvent, solid phase) View Scheme