1: 95 percent / K2CO3 / dimethylformamide / 1 h / 80 °C 2: 98 percent / NaI; Et3N / acetonitrile / 1 h / Heating 3: 95 percent / Cl2Ru(PCy3)(=CHPh)(N,N'-(Mes)2-imidazolidin-2-yl) / CH2Cl2 / 1 h / 50 °C 4: 81 percent / aq. NaOH / methanol / Heating View Scheme

1: 95 percent / K2CO3 / dimethylformamide / 1 h / 80 °C 2: 98 percent / NaI; Et3N / acetonitrile / 1 h / Heating 3: 95 percent / Cl2Ru(PCy3)(=CHPh)(N,N'-(Mes)2-imidazolidin-2-yl) / CH2Cl2 / 1 h / 50 °C 4: 81 percent / aq. NaOH / methanol / Heating 5: 94 percent / POCl3 / 1 h / Heating View Scheme

1: With sulfuric acid T=0 - 20°C; 2 h; Inert atmosphereSchlenk technique; 2: With sodium hydrogencarbonate Inert atmosphereSchlenk technique;