N-bromosuccinmide in dichloromethane T=25°C; 36 h;

oxalyl dichloride; dimethyl sulfoxide; triethylamine in dichloromethane T=-60°C; 0.25 h; reactivity-selectivity by mixing with 1-Phenylethanol; Kinetics;

silica-supported KHSO4 T=115°C; 5 h;