1: With Tl(OCOCF3)3 in trifluoroacetic acid T=20°C; 2 h; 2: With potassium iodide in water T=20°C;

1: With trifluoroacetic acid; Tl(OCOCF3)3 T=20°C; 2 h; 2: With potassium iodide in water T=20°C; 2 h; Further stages.;

in diethyl ether

1: 73 percent / soddium chlorite, 2-methylbutene 2: 100 percent / diethyl ether View Scheme

sodium hydroxide in methanol 1.5 h; Heating;

1: 89.3 percent / 40percent NaOH / methanol / 1.5 h / Heating 2: 70.9 percent / H2O; acetic acid / 48 h / Ambient temperature 3: 93.6 percent / dimethylformamide; H2O / 1 h / Heating View Scheme

1: 89.3 percent / 40percent NaOH / methanol / 1.5 h / Heating 2: 70.9 percent / H2O; acetic acid / 48 h / Ambient temperature 3: 93.6 percent / dimethylformamide; H2O / 1 h / Heating 4: 99 percent / 40percent aq. NaOH / methanol / 2 h / Heating View Scheme