1: 80 percent / NaOMe, Br2 / Ambient temperature 2: 77 percent / electrochem. generated 2-pyrrolidine anion / dimethylformamide / Ambient temperature; further base 3: 65 percent / NH4Br / 2 h / 90 - 100 °C / 70 - 100 Torr View Scheme

sodium tetrahydroborate; dihydrogen peroxide 1.) THF, room temperature, 7-8 h, 2.) 3N NaOH; Yield given. Multistep reaction;

Yield given. Multistep reaction;

1: 1.) CH3COOK, 3.) aq. Na2CO3 / 1.) electrolysis, electrochemical oxidation 2: 84 percent / p-toluenesulfonic acid / 0.5 h 3: 62 percent / NaIO4, RuO2 / ethyl acetate; H2O / 18 h / Ambient temperature 4: 77 percent / 7 M aq. HCl / ethanol / 12 h / Heating View Scheme

trichlorophosphate in 1,2-dichloro-ethane T=0 - 5°C;

acetic acid 12 h; anodic oxidation;

potassium acetate; sodium carbonate 1.) electrolysis, electrochemical oxidation; Yield given. Multistep reaction;