KNO2; 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical; oxygen in water 5 h; Reflux;

phosphorus tribromide in dichloromethane T=0°C;

hydrogen bromide in acetic acid T=50°C; 2 h;

N-bromosuccinmide; dibenzoyl peroxide in tetrachloromethane 3 h; Heating;

1: LiAlH4 / tetrahydrofuran / 0 °C / r.t., overnight 2: PPh3; CBr4 / CH2Cl2 / 2 h / reflux View Scheme

1: sodium tetrahydroborate / dichloromethane / 0.5 h / 20 °C 2: phosphorus tribromide / dichloromethane / 0.5 h / 0 °C View Scheme

hydrogen bromide; acetic acid T=80°C; 24 h;

1: Ni(II) complex of the Schiff base of glycine with (S)-o-[N-(N-benzylprolyl)amino]benzophenone; 4-(bromomethyl)-1,2-dimethylbenzene With sodium hydroxide in N,N-dimethyl-formamide T=20°C; 2: With hydrogenchloride in methanol T=70°C; 3: di-tert-butyl dicarbonate With sodium carbonate in 1,4-dioxane; water T=20°C;