1.1: 91 percent / iPr2NEt; tetrabutylammonium iodide / dimethylformamide / 4 h / 80 °C 2.1: LDA / tetrahydrofuran / 0.08 h / -78 °C 2.2: 81 percent / tetrahydrofuran / 0.08 h / -78 °C 3.1: 94 percent / PhCH=Ru{[(MeS)NCH2CH2N(MeS)]}(PCy3)Cl2 / toluene / 0.17 h / 120 °C 4.1: aq. H2O2 / toluene / 3 h 5.1: toluene / 1 h / 80 °C 6.1: 68 percent / SO2Cl2 / diethyl ether / 1.5 h / 0 °C 7.1: 74 percent / aq. HCl / dioxane / 1 h / 0 - 23 °C 8.1: 86 percent / K2CO3 / dimethylformamide / 1 h / 23 °C View Scheme