sodium tetrahydroborate; nickel dichloride in tetrahydrofuran; methanol T=0°C; 0.25 h;

tert.-butylhydroperoxide; bis(2,4,6-tri-methylphenyl)-diselenide in benzene 0.666667 h; Heating;

sulfuric acid; tetraethylammonium bromide; magnesium bromide in methanol Ambient temperature;

(BuSn)2O; (C6H6Se)2; bromine in benzene 8 h; Heating;

tert.-butylhydroperoxide in benzene Heating;

bromine; bis(tri-n-butyltin)oxide in benzene

1: tetra-n-butylammonium tetrafluoroborate; trifluorormethanesulfonic acid / dichloromethane / -78 °C / |Inert atmosphere; |Electrochemical reaction 2: dichloromethane / 1 h / -78 - 0 °C / |Inert atmosphere; |Electrochemical reaction 3: triethylamine / dichloromethane / 1 h / 0 - 25 °C / |Inert atmosphere; |Electrochemical reaction View Scheme

in diethyl ether 2 h; Ambient temperature;

chloramine-T 1.) CH2Cl2, -12 deg C, 2.) CH2Cl2, -25 deg C, 30 min; Yield given. Multistep reaction;