1.1: CH2Cl2 / 0 - 20 °C 2.1: Et3N / CH2Cl2 / 0 - 20 °C 2.2: 435 mg / CH2Cl2 / 17 h / 20 °C 3.1: n-BuLi / tetrahydrofuran; hexane / -78 - 20 °C 4.1: 217 mg / KSCN; Et3N / methanol; CH2Cl2 / 15 h / 20 °C 5.1: 52 percent / Cu(tfacac)2 / benzene / 24 h / 100 °C 6.1: 66 percent / SO2Cl2; Et3N / CH2Cl2 / 1 h / 0 °C 7.1: HCl / tetrahydrofuran / 1.5 h / 20 °C View Scheme

1.1: CH2Cl2 / 0 - 20 °C 2.1: Et3N / CH2Cl2 / 0 - 20 °C 2.2: 435 mg / CH2Cl2 / 17 h / 20 °C 3.1: n-BuLi / tetrahydrofuran; hexane / -78 - 20 °C 4.1: 217 mg / KSCN; Et3N / methanol; CH2Cl2 / 15 h / 20 °C 5.1: 52 percent / Cu(tfacac)2 / benzene / 24 h / 100 °C 6.1: 66 percent / SO2Cl2; Et3N / CH2Cl2 / 1 h / 0 °C View Scheme