1: 98 percent / potassium carbonate; potassium iodide / butan-2-one / 12 h / Heating 2: 93 percent / potassium t-butoxide / dimethylformamide / 2 h / 0 - 5 °C 3: 97 percent / acetic acid; cc. HCl / 11 h / 80 °C 4: 89 percent / pyridinium hydrobromide perbromide / CHCl3 / 1 h / 15 - 30 °C 5: 28 percent / potassium carbonate / CHCl3 / 96 h / Heating 6: 61 percent / cc. sulfuric acid / acetic acid / 51 h / 70 °C View Scheme

1: K2CO3 / acetone 2: aq. NaOH / methanol View Scheme

1: K2CO3 / acetone 2: aq. NaOH / methanol View Scheme

potassium carbonate in acetone

1: 98 percent / potassium carbonate; potassium iodide / butan-2-one / 12 h / Heating 2: 93 percent / potassium t-butoxide / dimethylformamide / 2 h / 0 - 5 °C 3: 97 percent / acetic acid; cc. HCl / 11 h / 80 °C 4: 89 percent / pyridinium hydrobromide perbromide / CHCl3 / 1 h / 15 - 30 °C View Scheme

potassium carbonate in N,N-dimethyl-formamide T=80°C; 18 h;

1: 98 percent / potassium carbonate; potassium iodide / butan-2-one / 12 h / Heating 2: 93 percent / potassium t-butoxide / dimethylformamide / 2 h / 0 - 5 °C 3: 97 percent / acetic acid; cc. HCl / 11 h / 80 °C View Scheme

in pyridine T=25°C;

[{(η5-C5Me5)IrCl}2(μ-Cl)2]; lithium carbonate; acetic acid; AgNTf2 in 1,2-dichloro-ethane T=50°C; 12 h; Inert atmosphere; Temperature;

1: sodium azide / water; acetone / 12 h / 0 - 20 °C 2: [{(η5-C5Me5)IrCl}2(μ-Cl)2]; AgNTf2; acetic acid; lithium carbonate / 1,2-dichloro-ethane / 12 h / 50 °C / |Inert atmosphere View Scheme