1: hydrazine hydrate / methanol; chloroform / 20 °C 2: sodium carbonate / ethyl acetate; water / 2 h / 0 °C 3: [{(η5-C5Me5)RhCl}2(μ-Cl)2]; caesium acetate; acetic acid / dichloromethane / 20 °C View Scheme

hydrazine hydrate in methanol; chloroform T=20°C; 24 h;