1: 19 percent / NaH / dimethylformamide / 1 h / 80 °C 2: Cl2Ru(=CHPh)(PCy3)(N,N-(Mes)2-imidazolidin-2-yl) / CH2Cl2 / 1 h / 50 °C 3: 25 mg / silica gel; air / hexane View Scheme

hydrogen iodide in water; acetonitrile T=0°C; 2 h;