triethylamine in anhydrous xylene; dichloromethane; water

1: 1.) acetonitrile, reflux, 35 min, 2.) reflux, 1 h 2: 1.62 g / 50percent hypophosphorous acid, sodium nitrite / 2 h / -20 °C 3: hydrogen / Pd-C / ethyl acetate / 4 h View Scheme

hydrogen; palladium on activated charcoal in ethyl acetate 4 h;

1: 1.62 g / 50percent hypophosphorous acid, sodium nitrite / 2 h / -20 °C 2: hydrogen / Pd-C / ethyl acetate / 4 h View Scheme