2,2,6,6-tetramethyl-1-piperidinyloxy, free radical; α,α,α-trifluorotoluene T=80°C; 0.5 h;

1: With diisobutylaluminium hydride in hexane; dichloromethane T=0°C; 3.5 h; Inert atmosphere; 2: With NAF in hexane; dichloromethane; water T=0°C; 0.5 h; Inert atmosphere; regiospecific reaction;