1.1: n-BuLi / tetrahydrofuran; hexane / 1.5 h / 0 °C 1.2: isopropyl borate / tetrahydrofuran; hexane / 0.83 h / 0 °C 1.3: 87 percent / AcOH; aq. H2O2 / tetrahydrofuran; hexane / 16 h / 0 - 20 °C 2.1: 89 percent / pyridine / 2.5 h / 0 °C 3.1: 96 percent / KBr; K3PO4 / (Ph3P)4Pd / dioxane / 26 h / 100 °C 4.1: 95 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone; p-TsOH*H2O / dioxane / 2.5 h / 50 °C 5.1: sodium dithionite / ethyl acetate; methanol; H2O / 4 h / 20 °C 6.1: n-BuLi / tetrahydrofuran; hexane / 0.33 h / -78 °C 6.2: 88.8 mg / tetrahydrofuran; hexane / 1.5 h / -78 - 0 °C 7.1: 90 percent / benzene / 36 h / 80 °C 8.1: 92 percent / methanolic HCl / CH2Cl2 / 30 h / 20 °C View Scheme