in N,N-dimethyl-formamide T=0°C; Irradiation;

1: 88 percent / dimethylformamide / 0 °C / Irradiation 2: 98 percent / m-chloroperbenzoic acid 3: 75 percent / 1,1,2-trichloro-1,2,2-trifluoro-ethane / 48 h / Ambient temperature 4: triflic anhydride, nitric acid / r.t., 3d View Scheme

1: 88 percent / dimethylformamide / 0 °C / Irradiation 2: 98 percent / m-chloroperbenzoic acid 3: 75 percent / 1,1,2-trichloro-1,2,2-trifluoro-ethane / 48 h / Ambient temperature View Scheme

1: 88 percent / dimethylformamide / 0 °C / Irradiation 2: 98 percent / m-chloroperbenzoic acid View Scheme