N-chloro-succinimide; sodium bromide in tetrahydrofuran T=0°C; 0.5 h;

sodium hydroxide; Br2BH-SMe2; bromine

9-borabicyclo[3.3.1]nonane dimer; bis(cyclohexanyl)borane; acetic acid 1.) THF, room temperature, 1 h, 2.) THF, room temperature, overnight; Yield given. Multistep reaction;