反应条件
1: With sodium hydroxide; sodium hypochlorite; 4-acetylamino 2,2,6,6-tetramethylpiperidin-N-oxyl; potassium bromide in water; toluene T=31 - 38°C; pH=6.9 - 8.9; 5 - 6 h; 2: With hydrogenchloride in tetrahydrofuran; water; toluene pH=2.2; Product distribution / selectivity;