1.1: 90.2 percent / SOCl2; pyridine / benzene / 7 h / 75 °C 2.1: BuLi; HMPA / hexane; tetrahydrofuran / 0.5 h / 0 °C 2.2: 89.4 percent / hexane; tetrahydrofuran / 1 h / 0 °C 3.1: 77.3 percent / hydroquinone; aq. H3PO4 / dioxane / 4.5 h / 100 °C 4.1: 60.8 percent / methanol / 1.5 h / 20 °C 5.1: 79.5 percent / Ag2O / CH2Cl2 / 24 h / 20 °C 6.1: 95.4 percent / NaI / acetone / 24 h / Heating 7.1: 82.4 percent / NaHCO3; DMSO / 11 h / 90 °C 8.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 8.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 9.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 10.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme

1.1: BuLi; HMPA / hexane; tetrahydrofuran / 0.5 h / 0 °C 1.2: 89.4 percent / hexane; tetrahydrofuran / 1 h / 0 °C 2.1: 77.3 percent / hydroquinone; aq. H3PO4 / dioxane / 4.5 h / 100 °C 3.1: 60.8 percent / methanol / 1.5 h / 20 °C 4.1: 79.5 percent / Ag2O / CH2Cl2 / 24 h / 20 °C 5.1: 95.4 percent / NaI / acetone / 24 h / Heating 6.1: 82.4 percent / NaHCO3; DMSO / 11 h / 90 °C 7.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 7.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 8.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 9.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme

1.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 1.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 2.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 3.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme

1.1: 60.8 percent / methanol / 1.5 h / 20 °C 2.1: 79.5 percent / Ag2O / CH2Cl2 / 24 h / 20 °C 3.1: 95.4 percent / NaI / acetone / 24 h / Heating 4.1: 82.4 percent / NaHCO3; DMSO / 11 h / 90 °C 5.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 5.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 6.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 7.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme

1.1: 79.5 percent / Ag2O / CH2Cl2 / 24 h / 20 °C 2.1: 95.4 percent / NaI / acetone / 24 h / Heating 3.1: 82.4 percent / NaHCO3; DMSO / 11 h / 90 °C 4.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 4.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 5.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 6.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme

1.1: 77.3 percent / hydroquinone; aq. H3PO4 / dioxane / 4.5 h / 100 °C 2.1: 60.8 percent / methanol / 1.5 h / 20 °C 3.1: 79.5 percent / Ag2O / CH2Cl2 / 24 h / 20 °C 4.1: 95.4 percent / NaI / acetone / 24 h / Heating 5.1: 82.4 percent / NaHCO3; DMSO / 11 h / 90 °C 6.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 6.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 7.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 8.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme

1.1: 95.4 percent / NaI / acetone / 24 h / Heating 2.1: 82.4 percent / NaHCO3; DMSO / 11 h / 90 °C 3.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 3.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 4.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 5.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme

1.1: 79.5 percent / Ag2O / CH2Cl2 / 24 h / 20 °C 2.1: 95.4 percent / NaI / acetone / 24 h / Heating 3.1: 82.4 percent / NaHCO3; DMSO / 11 h / 90 °C 4.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 4.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 5.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 6.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme

1.1: 82.4 percent / NaHCO3; DMSO / 11 h / 90 °C 2.1: BuLi / hexane; tetrahydrofuran / 1 h / 20 °C 2.2: 66.7 percent / tetrahydrofuran / 0.5 h / 20 °C 3.1: 97.1 percent / BBr3 / CH2Cl2 / 1 h / 20 °C 4.1: 86.5 percent / 10 percent NaOH / ethanol / 6 h / Heating View Scheme