1: 1H-tetrazole / acetonitrile / 0 - 20 °C / Inert atmosphere 2: 3-chloro-benzenecarboperoxoic acid / dichloromethane; acetonitrile / -40 - 20 °C / Inert atmosphere 3: ammonium formate; zinc / tetrahydrofuran; acetonitrile / 2 h / 20 °C / Inert atmosphere View Scheme

potassium fluoride in various solvent(s) T=130°C; P=150 Torr;

sodium hydroxide; tetreamethyl ammonium hydroxide in water T=80°C; 72 h;