1.1: 77 percent / potassium carbonate / tetrahydrofuran; methanol / 20 °C 2.1: BuLi / hexane; toluene / -40 - -20 °C 2.2: ZnCl2 / toluene; hexane; tetrahydrofuran / -40 - 0 °C 2.3: 70 percent / Pd(PPh3)4 / toluene; hexane; tetrahydrofuran / 20 h / 70 °C View Scheme

1.1: 77 percent / potassium carbonate / tetrahydrofuran; methanol / 20 °C 2.1: BuLi / toluene; hexane / -20 - 0 °C 2.2: 65 percent / diethyl ether; toluene; hexane / -20 - 20 °C View Scheme

1.1: 77 percent / potassium carbonate / tetrahydrofuran; methanol / 20 °C 2.1: BuLi / toluene; hexane / -20 - 0 °C 2.2: 72 percent / diethyl ether; toluene; hexane / -20 - 20 °C View Scheme