1: ammonium formate / methanol / 1 h / 90 °C / |Microwave irradiation 2: hydrogen; palladium on activated charcoal; acetic acid / methanol View Scheme

ammonium formate in methanol T=90°C; 1 h; Microwave irradiation; Solvent; regioselective reaction;

1: hydrogen bromide / acetic acid; acetone / 0.5 h / 0 °C / Inert atmosphere 2: palladium 10 on activated carbon; formic acid; hydrogen / methanol / 2 h / 20 °C 3: sodium azide / water; N,N-dimethyl-formamide / 12 h / 90 - 100 °C View Scheme