1: 1M potassium methoxide / methanol / 40 - 45 °C / electrolysis: anode: platinum foil; current source: galvanostat; current density 220 mA cm-2; current consumption: 1.25 F mol-1; cell voltage 40-70 V 2: hydroboration-oxidation 3: 42 percent / 1M potassium methoxide / methanol / 40 °C / electrolysis: anode: platinum foil; current source: galvanostat; current density 200 mA cm-2; current consumption: 3.03 F mol-1; cell voltage 50-60 V View Scheme

1: barium hydroxide octahydrate / methanol / 4 d, -10 deg C; 10 h, RT 2: 1M potassium methoxide / methanol / 40 - 45 °C / electrolysis: anode: platinum foil; current source: galvanostat; current density 220 mA cm-2; current consumption: 1.25 F mol-1; cell voltage 40-70 V 3: hydroboration-oxidation 4: 42 percent / 1M potassium methoxide / methanol / 40 °C / electrolysis: anode: platinum foil; current source: galvanostat; current density 200 mA cm-2; current consumption: 3.03 F mol-1; cell voltage 50-60 V View Scheme

1: 27.4 g / toluene-p-sulphonic acid / diethyl ether / 17 h / 20 °C View Scheme

(i) NaOH, MeOH, (electrolysis), (ii) KOH, EtOH; Multistep reaction;

Yield given. Multistep reaction. Yields of byproduct given;

Yield given. Multistep reaction. Yields of byproduct given;

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1: 49 percent / 48percent aq. HBr / petroleum ether / 24 h / Heating 2: PPTS / CH2Cl2 / 20 h / Ambient temperature View Scheme

hydrogen bromide in Petroleum ether 24 h; Heating;

bromine in Petroleum ether